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September 16th, 2019 | #1 |
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Ephemeris Data for Interstellar Comet C2019/Q4 Borisov for December 2019
Update! The number of observations used to calculate the orbit of C/2019 Q4 Borisov has risen to 191, and the observation window has increased to 17 days.
ORBITAL ELEMENTS (Source: JPL Horizons) a = −0.7781551285572716 AU e = 3.671308355477072 i = 43.41394016133616° Ω = 308.778082713247° ω = 207.5295555941889° T = 2458824.336063735653 PERIHELION time: 20h 03m 56s on 6 Dec 2019 UTC (JD 2458824.33606) Borisov mean Anomaly: 0° Borisov eccentric Anomaly: 0° Borisov true Anomaly: 0° HEC x = −1.69856974 AU HEC y = +0.99990482 AU HEC z = −0.660312704 AU HEC Vx = −9496.47252 m/s HEC Vy = −34101.7983 m/s HEC Vz = −27211.5493 m/s HEC distance: 2.0786923 AU HEC longitude: 149.51576° HEC latitude: −18.5213341° speed relative to the sun: 44649.5695 m/s = 0.0001489349 c obliquity of the ecliptic: 23.4366997° Geocentric distance: 2.07650491 AU = 17.2697647 light minutes Geocentric right ascension: 11h 24m 8.17s Geocentric declination −16° 21' 50.6" Angle Sun-Earth-Borisov: 76.4071512° CLOSEST APPROACH TO EARTH time: 22h 18m on 27 December 2019 UTC (JD 2458845.429) Borisov mean anomaly: 30.2859998° Borisov eccentric anomaly: 11.238287° Borisov true anomaly: 14.73215° HEC x = −1.801710900 AU HEC y = +0.578236969 AU HEC z = −0.986248492 AU HEC Vx = −7443.45651 m/s HEC Vy = −35031.0194 m/s HEC Vz = −26247.9238 m/s HEC distance: 2.13382432 AU HEC longitude: 162.206605° HEC latitude: −27.5290061° speed relative to the sun: 44401.9242 m/s = 0.0001481089 c obliquity of the ecliptic: 23.4366922° Geocentric distance: 2.01077281 AU = 16.7230875 light minutes Geocentric right ascension: 11h 56m 39.92s Geocentric declination: −31° 57' 07.4" Angle Sun-Earth-Borisov: 83.363751° EPHEMERIS for December 2019 All positions for 9pm Eastern Standard Time (date) (right ascension) (declination) 1 Dec 11h 16m 21.14s −12° 50' 40.0" 6 Dec 11h 24m 32.24s −16° 32' 53.5" A meddlesome waxing moon 11 Dec 11h 32m 33.81s −20° 16' 58.8" Full moon on 12 Dec. 16 Dec 11h 40m 24.50s −24° 00' 59.2" 21 Dec 11h 48m 02.68s −27° 42' 54.8" 26 Dec 11h 55m 26.44s −31° 20' 48.3" 31 Dec 12h 02m 33.54s −34° 52' 49.3" Borisov's hyperbolic excess speed is 33764.5 m/s. Borisov is expected to have a maximum apparent magnitude of +15.5 Keplerian elements for Earth's orbit used in the calculations (Source: JPL Horizons) a = 0.999979880035 AU e = 0.016746237127 i = 0.002629517126° Ω = 176.998598374440° ω = 286.128451007821° T = 2458852.8248407785 JD |
September 16th, 2019 | #2 |
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This comet appears to be of interstellar origin too, just like Oumuamua. Or possibly something pulled in from the Oort Cloud by our sun's gravity.
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September 17th, 2019 | #3 |
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Interesting.
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September 21st, 2019 | #4 |
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The astronomers are still fine-tuning the estimates of the orbital elements for C2019/Q4 Borisov. The most recently published set appear below. The determination for these elements involved 253 observations made over 21 days. The orbital elements are from JPL's Horizons webpage. The calculations are by me.
ORBITAL ELEMENTS a = −0.8292162089229415 AU e = 3.445224326645891 i = 43.86288391209771° Ω = 308.3331498795959° ω = 208.6433660112291° T = 2458825.5456982227 JD PERIHELION time: 1h 5m 48s on 8 Dec 2019 UTC (JD 2458825.54570) Borisov mean Anomaly: 0° Borisov eccentric Anomaly: 0° Borisov true Anomaly: 0° HEC x = −1.65339477 AU HEC y = +0.961210424 AU HEC z = −0.673499574 AU HEC Vx = −8777.78593 m/s HEC Vy = −33890.4638 m/s HEC Vz = −26819.2028 m/s HEC distance: 2.02761965 AU HEC longitude: 149.828179° HEC latitude: −19.400094° speed relative to the sun: 44100.8243 m/s = 0.000147104516 c obliquity of the ecliptic: 23.4366993° Geocentric distance: 2.01814923 AU = 16.7844354 light minutes Geocentric right ascension: 11h 27m 03.85s Geocentric declination: −17° 43′ 56.4" Angle Sun-Earth-Borisov: 76.4422795° Angle Earth-Sun-Borisov: 75.3737762° CLOSEST APPROACH TO EARTH time: 2h 48m on 28 December 2019 UTC (JD 2458845.617) Borisov mean anomaly: 26.198589° Borisov eccentric anomaly: 10.6281615° Borisov true anomaly: 14.2156562° HEC x = −1.74324442 AU HEC y = +0.562480355 AU HEC z = −0.978914843 AU HEC Vx = −6730.66368 m/s HEC Vy = −34811.9564 m/s HEC Vz = −25825.2031 m/s HEC distance: 2.07691106 AU HEC longitude: 162.117033° HEC latitude: −28.1208006° speed relative to the sun: 43864.7382 m/s = 0.000146317017 c obliquity of the ecliptic: 23.4366922° Geocentric distance: 1.95820212 AU = 16.2858705 light minutes Geocentric right ascension: 11h 58m 55.14s Geocentric declination: −32° 53′ 45.1" Angle Sun-Earth-Borisov: 82.7202806° Angle Earth-Sun-Borisov: 69.2675344° EPHEMERIS for December 2019 All positions for 9pm Eastern Standard Time (date) (right ascension) (declination) 1 Dec 11h 17m 06.88s −13° 13' 15.4" 6 Dec 11h 25m 28.22s −16° 59' 59.2" A meddlesome waxing moon 11 Dec 11h 33m 41.69s −20° 48' 55.2" Full moon on 12 Dec. 16 Dec 11h 41m 46.08s −24° 38' 01.1" 21 Dec 11h 49m 39.93s −28° 25' 10.3" 26 Dec 11h 57m 21.45s −32° 08' 18.3" 31 Dec 12h 04m 48.51s −35° 45' 28.3" Expected brightest apparent magnitude: +15.5 Borisov's hyperbolic excess speed: 32708.4 m/s HEC : heliocentric ecliptic coordinates Right ascension and declination are measured in geocentric celestial coordinates. Angles are subtended by the object in the middle; the two objects on the ends are at the far end of the "rays." That is: Angle sun-Earth-Borisov is the angular distance between the sun and Borisov, to an observer on Earth. |
September 23rd, 2019 | #5 |
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September 27th, 2019 | #6 |
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2I/Borisov is now confirmed as interstellar in origin. One proposal has the comet originating from Kruger 60, a binary star system 13.15 LY from the Sun in the constellation Cepheus. These red dwarf stars orbit each other every 44.6 years.
https://forum.nasaspaceflight.com/in...?topic=49027.0 https://en.wikipedia.org/wiki/Kruger_60
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September 30th, 2019 | #7 |
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Ephemeris Data for Interstellar Comet C2019/Q4 Borisov for December 2019
(Posted here 30 September 2019) Observations: 352 over 28 days. ORBITAL ELEMENTS a = −0.8629627927855268 AU e = 3.314321521681457 i = 44.13726830050443° Ω = 308.0625257752799° ω = 209.3364247323087° T = 2458826.2966745845 JD ECLIPTIC CROSSING From North to South at 9h 46m on 26 October 2019 UTC (JD 2458782.9071) Borisov mean anomaly: −53.3459328° Borisov eccentric anomaly: −22.2440684° Borisov true anomaly: −29.3369573° HEC x = −1.36585394 AU HEC y = +1.74431039 AU HEC z = 0 HEC Vx = −12141.0748 m/s HEC Vy = −30433.6517 m/s HEC Vz = −27481.7902 m/s HEC distance: 2.2154403 AU HEC longitude: 128.062144° HEC latitude: 0° Sun-relative speed: 42765.192 m/s = 0.00014264933 c obliquity of the ecliptic: 23.4367145° Geocentric distance: 2.51604687 AU = 20.9253237 light minutes Geocentric right ascension: 10h 13m 00.11s Geocentric declination: +11° 02′ 29.4″ Angle Sun-Earth-Borisov: 61.1924191° Angle Earth-Sun-Borisov: 95.6523918° PERIHELION time: 19h 7m 12s on 8 Dec 2019 UTC (JD 2458826.29667) Borisov mean Anomaly: 0° Borisov eccentric Anomaly: 0° Borisov true Anomaly: 0° HEC x = −1.62629197 AU HEC y = +0.937854121 AU HEC z = −0.68139968 AU HEC Vx = −8340.84106 m/s HEC Vy = −33772.0624 m/s HEC Vz = −26575.6290 m/s HEC distance: 1.99717336 AU HEC longitude: 150.028704° HEC latitude: −19.9489066° speed relative to the sun: 43776.545 m/s = 0.000146022836 c obliquity of the ecliptic: 23.4366990° Geocentric distance: 1.98341086 AU = 16.4955252 light minutes Geocentric right ascension: 11h 28m 55.32s Geocentric declination: −18° 35′ 41.0" Angle Sun-Earth-Borisov: 76.4502253° Angle Earth-Sun-Borisov: 74.8988850° CLOSEST APPROACH TO EARTH time: 5h 5m on 28 December 2019 UTC (JD 2458845.7115) Borisov mean anomaly: 23.8698428° Borisov eccentric anomaly: 10.2358717° Borisov true anomaly: 13.8703707° HEC x = −1.7083606 AU HEC y = +0.5535491 AU HEC z = −0.974000527 AU HEC Vx = −6303.72996 m/s HEC Vy = −34686.0621 m/s HEC Vz = −25566.1023 m/s HEC distance: 2.04293651 AU HEC longitude: 162.046454° HEC latitude: −28.4743282° speed relative to the sun: 43548.6567 m/s = 0.0001452626827 c obliquity of the ecliptic: 23.4366921° Geocentric distance: 1.9270542 AU = 16.026821 light minutes Geocentric right ascension: 12h 00m 19.13s Geocentric declination: −33° 27′ 37.5" Angle Sun-Earth-Borisov: 82.3130245° Angle Earth-Sun-Borisov: 69.1958519° EPHEMERIS for December 2019 All positions for 9pm Eastern Standard Time (date) (right ascension) (declination) 1 Dec 11h 17m 35.00s −13° 26' 52.1" 6 Dec 11h 26m 02.82s −17° 16' 22.7" A meddlesome waxing moon 11 Dec 11h 34m 23.86s −21° 08' 18.3" Full moon on 12 Dec. 16 Dec 11h 42m 37.04s −25° 00' 33.2" 21 Dec 11h 50m 41.01s −28° 50' 56.3" 26 Dec 11h 58m 34.09s −32° 37' 18.7" 31 Dec 12h 06m 14.25s −36° 17' 39.3" Expected brightest apparent magnitude: +15.5 Borisov's hyperbolic excess speed: 32062.5 m/s HEC : heliocentric ecliptic coordinates Right ascension and declination are measured in geocentric celestial coordinates. Borisov entered the solar system from a direction that is closely marked by the Stock 2 open star cluster near the border between Cassiopia and Perseus. It is about two-and-a-half degrees north by northwest of the Double Cluster in Perseus. Today (30 September 2019) Borisov can be found at Right Ascension: 9h 26m 33.63s Declination: +23° 06' 56.6" ...which is in Leo, between ε Leonis and λ Leonis. Last edited by Jerry Abbott; September 30th, 2019 at 03:07 AM. |
October 8th, 2019 | #8 |
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(Posted here 8 October 2019)
Observations: 402 over 37 days. ORBITAL ELEMENTS a = −0.852093539281182 AU e = 3.354075587715023 i = 44.05688099659861° Ω = 308.1430298932183° ω = 209.1418223232404° T = 2458826.0739990142 JD ECLIPTIC CROSSING From North to South at 10h 8m 8s on 26 October 2019 UTC (JD 2458782.92231) Borisov mean anomaly: −54.0718309° Borisov eccentric anomaly: −22.1747851° Borisov true anomaly: −29.1418229° HEC x = −1.3727507 AU HEC y = +1.74802867 AU HEC z = 0 HEC Vx = −12216.5272 m/s HEC Vy = −30524.6196 m/s HEC Vz = −27538.9017 m/s HEC distance: 2.22262204 AU HEC longitude: 128.143029° HEC latitude: 0° speed relative to the sun: 42888.0758 m/s = 0.000143059222 c obliquity of the ecliptic: 23.4367145° Geocentric distance: 2.52364945 AU = 20.9885525 light minutes Geocentric right ascension: 10h 13m 01.04s Geocentric declination: +11° 02′ 23.0″ Angle Sun-Earth-Borisov: 61.2033762° Angle Earth-Sun-Borisov: 95.7181233° PERIHELION time: 13h 46m 34s on 8 Dec 2019 UTC (JD 2458826.074) Borisov mean anomaly: 0° Borisov eccentric anomaly: 0° Borisov true anomaly: 0° HEC x = −1.63416383 AU HEC y = +0.944315936 AU HEC z = −0.679250399 AU HEC Vx = −8464.22089 m/s HEC Vy = −33818.2948 m/s HEC Vz = −26651.7784 m/s HEC distance: 2.0058926 AU HEC longitude: 149.978153° HEC latitude: −19.7932761° speed relative to the sun: 43882.0851 m/s = 0.000146374880 c obliquity of the ecliptic: 23.4366991° Geocentric distance: 1.99356926 AU = 16.58001 light minutes Geocentric right ascension: 11h 28m 24.21s Geocentric declination: −18° 20′ 52.6″ Angle Sun-Earth-Borisov: 76.4376538° Angle Earth-Sun-Borisov: 75.0481667° CLOSEST APPROACH TO MARS time: 4h 17m on 9 December 2019 UTC (JD 2458826.6785) Borisov mean anomaly: 0.757477035° Borisov eccentric anomaly: 0.321770195° Borisov true anomaly: 0.437602988° HEC x = −1.63710797 AU HEC y = +0.932502726 AU HEC z = −0.688550708 AU HEC Vx = −8401.45478 m/s HEC Vy = −33854.3055 m/s HEC Vz = −26625.5343 m/s HEC distance: 2.00593767 AU HEC longitude: 150.334002° HEC latitude: −20.0753891° speed relative to the sun: 43881.8586 m/s = 0.000146374124 c Distance from Mars: 1.72622438 AU = 14.3565704 light minutes Angle Sun-Mars-Borisov: 73.7457712° Angle Mars-Sun-Borisov: 55.7062918° CLOSEST APPROACH TO EARTH time: 3h 48m on 28 December 2019 UTC (JD 2458845.658) Borisov mean anomaly: 24.5400004° Borisov eccentric anomaly: 10.3442762° Borisov true anomaly: 13.9606081° HEC x = −1.71833621 AU HEC y = +0.556129062 AU HEC z = −0.975294055 AU HEC Vx = −6425.9335 m/s HEC Vy = −34733.5313 m/s HEC Vz = −25647.6127 m/s HEC distance: 2.05259771 AU HEC longitude: 162.066141° HEC latitude: −28.3691884° speed relative to the sun: 43652.1575 m/s = 0.000145607924 c obliquity of the ecliptic: 23.4366921° Geocentric distance: 1.93627047 AU = 16.1034705 light minutes Geocentric right ascension: 11h 59m 55.28s Geocentric declination: −33° 17′ 14.7″ Angle Sun-Earth-Borisov: 82.4099363° Angle Earth-Sun-Borisov: 69.2381358° EPHEMERIS for December 2019 All positions for 9pm Eastern Standard Time (date) (right ascension) (declination) (geoc. distance) 1 Dec 11h 17m 28.47s −13° 23' 23.2" 2.03908496 6 Dec 11h 25m 54.63s −17° 12' 07.9" 2.00283791 A meddlesome waxing moon 11 Dec 11h 34m 13.71s −21° 03' 13.8" 1.97454386 Full moon on 12 Dec. 16 Dec 11h 42m 24.60s −24° 54' 35.6" 1.95417253 21 Dec 11h 50m 25.90s −28° 44' 03.8" 1.94156354 26 Dec 11h 58m 15.92s −32° 29' 30.6" 1.93643288 31 Dec 12h 05m 52.57s −36° 08' 56.2" 1.93838759 Expected brightest apparent magnitude: +15.5 Borisov's hyperbolic excess speed: 32266.3243 m/s HEC : heliocentric ecliptic coordinates Right ascension and declination are measured in geocentric celestial coordinates. Borisov entered the solar system from a direction that is closely marked by the Stock 2 open star cluster near the border between Cassiopia and Perseus. It is about two-and-a-half degrees north by northwest of the Double Cluster in Perseus. Today (8 October 2019 at 10:00pm EDT, or JD 2458765.583333) Borisov can be found in Leo at Right Ascension: 9h 41m 21.29s Declination: +19° 42' 47.2" |
October 18th, 2019 | #9 |
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(Posted here 18 October 2019)
Observations: 424 over 40 days. ORBITAL ELEMENTS a = −0.8520721823439664 AU e = 3.354200627757959 i = 44.05644103535197° Ω = 308.1433928830633° ω = 209.1401668115733° T = 2458826.0726055973 JD ECLIPTIC CROSSING Descending node at 10h 8m 23s on 26 October 2019 UTC (JD 2458782.922495) Borisov mean anomaly: −54.0718714° Borisov eccentric anomaly: −22.173711° Borisov true anomaly: −29.1401642° HEC x = −1.37278511 AU HEC y = +1.74804954 AU HEC z = 0 HEC Vx = −12217.1918 m/s HEC Vy = −30524.4730 m/s HEC Vz = −27538.9976 m/s HEC distance: 2.22265970 AU HEC longitude: 128.143395° HEC latitude: 0° speed relative to the sun: 42888.2224 m/s = 0.000143059711 c obliquity of the ecliptic: 23.4367145° Geocentric distance: 2.52368659 AU = 20.9888613 light minutes Geocentric right ascension: 10h 13m 01.04s Geocentric declination: +11° 02′ 23.0″ Angle Sun-Earth-Borisov: 61.2035780° Angle Earth-Sun-Borisov: 95.7182893° PERIHELION time: 13h 44m 33s on 8 Dec 2019 UTC (JD 2458826.072606) Borisov mean anomaly: 0° Borisov eccentric anomaly: 0° Borisov true anomaly: 0° HEC x = −1.63420858 AU HEC y = +0.944373518 AU HEC z = −0.67922886 AU HEC Vx = −8465.20338 m/s HEC Vy = −33817.8892 m/s HEC Vz = −26652.0051 m/s HEC distance: 2.00594887 AU HEC longitude: 149.977319° HEC latitude: −19.7920439° speed relative to the sun: 43882.0997 m/s = 0.000146374929 c obliquity of the ecliptic: 23.4366991° Geocentric distance: 1.99362582 AU = 16.58048 light minutes Geocentric right ascension: 11h 28m 23.92s Geocentric declination: −18° 20′ 45.7″ Angle Sun-Earth-Borisov: 76.4380468° Angle Earth-Sun-Borisov: 75.0485896° CLOSEST APPROACH TO MARS time: 4h 13m on 9 December 2019 UTC (JD 2458826.6755) Borisov mean anomaly: 0.755488005° Borisov eccentric anomaly: 0.320908239° Borisov true anomaly: 0.436425486° HEC x = −1.63714525 AU HEC y = +0.932591927 AU HEC z = −0.688504492 AU HEC Vx = −8402.60813 m/s HEC Vy = −33853.8037 m/s HEC Vz = −26625.8344 m/s HEC distance: 2.00599369 AU HEC longitude: 150.332206° HEC latitude: −20.0733988° speed relative to the sun: 43881.8745 m/s = 0.000146374178 c Distance from Mars: 1.7262528 AU = 14.3568068 light minutes Angle Sun-Mars-Borisov: 73.7475417° Angle Mars-Sun-Borisov: 55.7060854° CLOSEST APPROACH TO EARTH time: 3h 49m 11s on 28 December 2019 UTC (JD 2458845.65915) Borisov mean anomaly: 24.544106° Borisov eccentric anomaly: 10.3454406° Borisov true anomaly: 13.961987° HEC x = −1.71840213 AU HEC y = +0.556140343 AU HEC z = −0.975313300 AU HEC Vx = −6426.76547 m/s HEC Vy = −34733.2059 m/s HEC Vz = −25647.8004 m/s HEC distance: 2.05266509 AU HEC longitude: 162.066445° HEC latitude: −28.3687833° speed relative to the sun: 43652.1313 m/s = 0.000145607837 c obliquity of the ecliptic: 23.4366921° Geocentric distance: 1.93631563 AU = 16.103846 light minutes Geocentric right ascension: 11h 59m 55.10s Geocentric declination: −33° 17′ 13.1″ Angle Sun-Earth-Borisov: 82.4116596° Angle Earth-Sun-Borisov: 69.2373048° EPHEMERIS for December 2019 All positions for 9pm Eastern Standard Time (date) (right ascension) (declination) (geoc. distance) 1 Dec 11h 17m 28.35s −13° 23' 20.7" 2.03913321 6 Dec 11h 25m 54.49s −17° 12' 05.1" 2.00288620 A meddlesome waxing moon 11 Dec 11h 34m 13.55s −21° 03' 10.5" 1.97459187 Full moon on 12 Dec. 16 Dec 11h 42m 24.40s −24° 54' 31.8" 1.95421996 21 Dec 11h 50m 25.68s −28° 43' 59.6" 1.94161010 26 Dec 11h 58m 15.66s −32° 29' 26.0" 1.93647831 31 Dec 12h 05m 52.27s −36° 08' 51.2" 1.93843168 Expected brightest apparent magnitude: +15.3 (in mid-December 2019) Borisov's hyperbolic excess speed: 32266.7287 m/s |
October 18th, 2019 | #10 |
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October 23rd, 2019 | #11 |
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Ephemeris Data for 2I/Borisov
(Posted here 23 October 2019) Observations: 651 over 51 days. ORBITAL ELEMENTS a = −0.8522734226967555 AU e = 3.353491649120846 i = 44.05785522652224° Ω = 308.1419761457706° ω = 209.1427356972629° T = 2458826.0758495377 JD ECLIPTIC CROSSING Descending node at 10h 8m 1s on 26 October 2019 UTC (JD 2458782.922228) Borisov mean anomaly: −54.0571181° Borisov eccentric anomaly: −22.1742336° Borisov true anomaly: −29.1427358° HEC x = −1.37267094 AU HEC y = +1.74799326 AU HEC z = 0 HEC Vx = −12216.1913 m/s HEC Vy = −30522.4355 m/s HEC Vz = −27537.9848 m/s HEC distance: 2.22254492 AU HEC longitude: 128.141976° HEC latitude: 0° speed relative to the sun: 42885.8369 m/s = 0.000143051754 c obliquity of the ecliptic: 23.4367145° Geocentric distance: 2.52356355 AU = 20.9878381 light minutes Geocentric right ascension: 10h 13m 1.00s Geocentric declination: +11° 02′ 23.2″ That's about 1.5° SE of Regulus. Angle Sun-Earth-Borisov: 61.2034864° Angle Earth-Sun-Borisov: 95.7171398° PERIHELION time: 13h 49m 13s on 8 Dec 2019 UTC (JD 2458826.075850) Borisov mean anomaly: 0° Borisov eccentric anomaly: 0° Borisov true anomaly: 0° HEC x = −1.63408309 AU HEC y = +0.944293541 AU HEC z = −0.679256624 AU HEC Vx = −8463.50553 m/s HEC Vy = −33816.5464 m/s HEC Vz = −26650.7156 m/s HEC distance: 2.00581838 AU HEC longitude: 149.977515° HEC latitude: −19.794228° speed relative to the sun: 43879.9542 m/s = 0.000146367772 c obliquity of the ecliptic: 23.4366991° Geocentric distance: 1.99346613 AU = 16.57915225 light minutes Geocentric right ascension: 11h 28m 24.28s Geocentric declination: −18° 20′ 58.0″ That's about a degree ~SE from γ Crateris and about a degree east of λ Crateris. Angle Sun-Earth-Borisov: 76.4386454° Angle Earth-Sun-Borisov: 75.0459011° CLOSEST APPROACH TO MARS time: 4h 17m 40s on 9 December 2019 UTC (JD 2458826.678945) Borisov mean anomaly: 0.755470974° Borisov eccentric anomaly: 0.320997673° Borisov true anomaly: 0.436577391° HEC x = −1.63702014 AU HEC y = +0.932508505 AU HEC z = −0.688534883 AU HEC Vx = −8400.8821 m/s HEC Vy = −33852.4767 m/s HEC Vz = −26624.5300 m/s HEC distance: 2.00586324 AU HEC longitude: 150.332527° HEC latitude: −20.0756848° speed relative to the sun: 43879.7288 m/s = 0.000146367020 c Distance from Mars: 1.72621629 AU = 14.3565031 light minutes Angle Sun-Mars-Borisov: 73.7430109° Angle Mars-Sun-Borisov: 55.7078353° CLOSEST APPROACH TO EARTH time: 3h 51m 39s on 28 December 2019 UTC (JD 2458845.66087) Borisov mean anomaly: 24.5335093° Borisov eccentric anomaly: 10.3441027° Borisov true anomaly: 13.9611652° HEC x = −1.71825045 AU HEC y = +0.556105460 AU HEC z = −0.975302747 AU HEC Vx = −6424.98835 m/s HEC Vy = −34731.9036 m/s HEC Vz = −25646.3778 m/s HEC distance: 2.05252365 AU HEC longitude: 162.066016° HEC latitude: −28.3705806° speed relative to the sun: 43649.9977 m/s = 0.000145600720 c obliquity of the ecliptic: 23.4366921° Geocentric distance: 1.93616544 AU = 16.1025969 light minutes Geocentric right ascension: 11h 59m 55.39s Geocentric declination: −33° 17′ 24.0″ That's about 1.5° east of β Hydrae. Angle Sun-Earth-Borisov: 82.4110836° Angle Earth-Sun-Borisov: 69.2357937° EPHEMERIS for December 2019 All positions for 9pm Eastern Standard Time (date) (right ascension) (declination) (geoc. distance) 1 Dec 11h 17m 28.36s −13° 23' 23.3" 2.03899613 6 Dec 11h 25m 54.52s −17° 12' 08.2" 2.00274664 11 Dec 11h 34m 13.59s −21° 03' 14.3" 1.97444977 Full moon on 12 Dec. 16 Dec 11h 42m 24.47s −24° 54' 36.4" 1.95407529 21 Dec 11h 50m 25.76s −28° 44' 04.9" 1.94146290 26 Dec 11h 58m 15.77s −32° 29' 32.2" 1.93632864 31 Dec 12h 05m 52.42s −36° 08' 58.2" 1.93827961 Expected brightest apparent magnitude: +15.3 (in mid-December 2019) Borisov's hyperbolic excess speed: 32262.9190 m/s |
December 15th, 2019 | #12 | |
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Interstellar Comet Borisov Shines in Incredible New Hubble Photos
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"Military men are dumb, stupid animals to be used as pawns for foreign policy." --Henry A. Kissinger, jewish politician and advisor Last edited by Ray Allan; December 15th, 2019 at 05:58 AM. |
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