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1863 Antinous (1948 EA)
Classification: Apollo [NEO]          SPK-ID: 2001863
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 198 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6065072166601064 2.6684e-08  
a 2.258411530649289 1.595e-09 au
q .8886686391220981 6.0226e-08 au
i 18.40043382088493 5.4827e-06 deg
node 346.4403101410485 1.1406e-05 deg
peri 268.0670168922298 1.1701e-05 deg
M 69.81354958291149 3.3266e-06 deg
tp 2458760.096785979125
(2019-Oct-03.59678598)		 1.1355e-05 TDB
period 1239.661320253209
3.39		 1.3133e-06
3.596e-09		 d
yr
n .2904018977751663 3.0764e-10 deg/d
Q 3.62815442217648 2.5624e-09 au
   Orbit Determination Parameters
   # obs. used (total)      1044  
   data-arc span      26615 days (72.87 yr)  
   first obs. used      1948-03-05  
   last obs. used      2021-01-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48798  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jan-16 06:03:16  

Additional Information
 Earth MOID = .182709 au 
 Jupiter MOID = 2.02021 au 
 T_jup = 3.298 
[ show covariance matrix ]

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.40   n/a E2021B10  
diameter diameter 2.1 km n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543  
rotation period rot_per 7.453 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (1999) http://www.asu.cas.cz/~ppravec/neo.htm]
[Warner, B.D. (2016) Minor Planet Bull. 43, 240-250.]
[Warner, B.D. (2017) Minor Planet Bull. 44, 22-36.]
[Warner, B.D.; Pravec, P.; Kusnirak, P.; Benishek, V.; Ferrero, A. (2017) Minor Planet Bull. 44, 206-212.]
geometric albedo albedo 0.24   n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543  
B-V BV 0.763   0.019 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=21.71, mean=22.67, max.=23.62) deg.
U-B UB 0.359   0.042 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=21.71, mean=22.67, max.=23.62) deg.
Tholen spectral type spec_T SU   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B Sq   n/a Binzel et al. (2001) Icarus 151, 139-149  

1863 Antinous (1948 EA)          Discovered 1948-Mar-07 by Wirtanen, C. A. at Mount Hamilton
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)		 Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1907-Oct-11 06:15 < 00:01 Mars 0.0894321266315722 0.0894275224625467 0.0894367308330617 18.0795332092543 18.0793561463669 2417859.760442485 0.36023278979095 244.853539047308 12.4484942806776 20.36368862812 375346.49803895 T 198 CATAB v2.0f-lin.ifort 2021-Jan-16 06:03:19 2021-Jan-16 06:03
1914-Mar-29 02:55 < 00:01 Earth 0.216801835426121 0.216798552698805 0.216805118223239 19.8211192877941 19.8204992359266 2420220.621335493 0.32889684938817 254.228791890574 11.934077738199 49.9932247754923 1992123.16494395 T 198 CATAB v2.0f-lin.ifort 2021-Jan-16 06:03:19 2021-Jan-16 06:03
1931-Apr-06 05:10 < 00:01 Earth 0.174222025882574 0.174221437341823 0.17422261446784 15.6406739809359 15.6396961418117 2426437.715201327 0.230040523370272 153.931842500576 11.5655814177965 -79.8766982124022 2236759.92886124 T 198 CATAB v2.0f-lin.ifort 2021-Jan-16 06:03:19 2021-Jan-16 06:03
1948-Apr-05 23:14 < 00:01 Earth 0.176868403586462 0.176867939470798 0.176868867715417 15.3983349846389 15.3973566168751 2432647.468366858 0.138055881854289 91.3314983743587 11.5969246547398 -77.2249737418634 2257380.56957528 T 198 CATAB v2.0f-lin.ifort 2021-Jan-16 06:03:19 2021-Jan-16 06:03
1965-Feb-02 06:30 < 00:01 Mars 0.0984644561348553 0.0984641371585063 0.0984647751113834 16.2935272790405 16.2933488301029 2438793.770743595 0.0826423354576342 42.8416485024995 15.6828225528603 86.1807610070639 934910.45655554 T 198 CATAB v2.0f-lin.ifort 2021-Jan-16 06:03:19 2021-Jan-16 06:03
1965-Apr-06 03:08 < 00:01 Earth 0.179654670716965 0.179654330697774 0.179655010738811 15.303232013258 15.3022628332791 2438856.630505816 0.0837428815304635 50.0549901653402 11.5643744361227 -75.2472376752732 2295595.24041103 T 198 CATAB v2.0f-lin.ifort 2021-Jan-16 06:03:19 2021-Jan-16 06:03
1982-Apr-05 22:46 < 00:01 Earth 0.182027986324143 0.182027723354423 0.182028249294194 15.452018226371 15.4510708941841 2445065.448451912 0.0623621880944021 28.8337100420579 11.5493456765175 -76.4016417214156 2340891.98294572 T 198 CATAB v2.0f-lin.ifort 2021-Jan-16 06:03:19 2021-Jan-16 06:03
1999-Apr-01 14:44 < 00:01 Earth 0.189409424749664 0.189409183736294 0.189409665763055 17.856363530616 17.8555757100147 2451270.114114023 0.049482772214756 18.400270243186 11.7065050301003 78.9558738795624 2339338.66737889 T 198 CATAB v2.0f-lin.ifort 2021-Jan-16 06:03:19 2021-Jan-16 06:03
2016-Mar-27 11:19 < 00:01 Earth 0.237177036452987 0.237176735094861 0.23717733781122 20.2354298440776 20.2348746648069 2457474.971428706 0.0449603231755437 19.9228409544548 11.8077233369691 54.6023784812073 2563849.1028021 T 198 CATAB v2.0f-lin.ifort 2021-Jan-16 06:03:19 2021-Jan-16 06:03
2033-Mar-23 16:37 < 00:01 Earth 0.30633424215579 0.306333718992213 0.306334765319733 22.6518698506197 22.6514858636961 2463680.192122440 0.0489690232892279 32.0594933846691 11.7992757902672 38.691233315333 2549219.32868562 T 198 CATAB v2.0f-lin.ifort 2021-Jan-16 06:03:19 2021-Jan-16 06:03
2043-Aug-24 20:36 < 00:01 Earth 0.360031419355421 0.360030587566216 0.360032251145037 24.2545597869533 24.2542546594965 2467486.358248500 0.0583793809805097 45.9108574873615 11.5320499017344 26.2904756590146 2185750.38669843 T 198 CATAB v2.0f-lin.ifort 2021-Jan-16 06:03:19 2021-Jan-16 06:03
2050-Mar-17 21:01 < 00:01 Earth 0.429653068057413 0.429652162384444 0.429653973730797 26.4321481066914 26.4319134872979 2469883.375834972 0.0651872055940728 50.291441021136 11.757423815951 26.9060567741695 2580688.5469461 T 198 CATAB v2.0f-lin.ifort 2021-Jan-16 06:03:19 2021-Jan-16 06:03
2060-Aug-19 18:18 < 00:01 Earth 0.277291535717117 0.277290475865735 0.277292595570673 21.6938409454581 21.6933980066571 2473691.262683980 0.0838389916061582 66.0501870193548 11.5339598516429 37.5293424191494 2119311.88165405 T 198 CATAB v2.0f-lin.ifort 2021-Jan-16 06:03:19 2021-Jan-16 06:03
2077-Aug-17 02:41 < 00:01 Earth 0.23461176226571 0.234610632069139 0.234612892468043 20.1511939152108 20.1506303192576 2479897.611514728 0.104842628689896 81.7567828446348 11.5759289771613 47.0395118100212 2119897.57136707 T 198 CATAB v2.0f-lin.ifort 2021-Jan-16 06:03:19 2021-Jan-16 06:03
2094-Aug-13 08:54 < 00:01 Earth 0.19312740065759 0.193126624763646 0.193128176565772 18.0439500712053 18.0431854505134 2486102.870759879 0.128327030471639 94.8590457726909 11.4906168727434 66.8996870996156 2221542.08031377 T 198 CATAB v2.0f-lin.ifort 2021-Jan-16 06:03:19 2021-Jan-16 06:03
2111-Aug-16 02:17 < 00:01 Earth 0.203638263072137 0.203636940759121 0.203639585406093 18.8827300375642 18.8820370967257 2492313.595354047 0.163299117250597 123.687342302078 11.7031795272108 58.1977279825861 2114030.32261026 T 198 CATAB v2.0f-lin.ifort 2021-Jan-16 06:03:19 2021-Jan-16 06:03
2128-Aug-22 00:22 < 00:01 Earth 0.306178063563984 0.30617526764545 0.306180859492717 22.6619803484158 22.661596337026 2498529.515074404 0.205805150006877 165.096504077552 11.9931094651364 32.4808884545513 1940221.78078354 T 198 CATAB v2.0f-lin.ifort 2021-Jan-16 06:03:19 2021-Jan-16 06:03
2135-Mar-18 01:17 < 00:01 Earth 0.472758204785315 0.472754931988952 0.472761477586301 27.3355143143419 27.335308133803 2500928.553549579 0.210956774118127 179.164480506645 11.2163280528268 24.4217592169953 2478932.74554958 T 198 CATAB v2.0f-lin.ifort 2021-Jan-16 06:03:19 2021-Jan-16 06:03
2145-Aug-28 19:43 < 00:01 Earth 0.441509195792227 0.441505747396965 0.441512644191252 26.6634544556711 26.6632281173804 2504745.321718099 0.228458074821138 183.668424652885 12.110412149719 20.6188255429941 1830590.30670717 T 198 CATAB v2.0f-lin.ifort 2021-Jan-16 06:03:19 2021-Jan-16 06:03
2152-Mar-28 11:54 < 00:01 Earth 0.28588391507166 0.285881212975905 0.285886617198437 20.69737099254 20.6969206819339 2507148.995630117 0.244416844315611 200.874754021424 10.7794339218988 47.9652172547177 2788528.30658924 T 198 CATAB v2.0f-lin.ifort 2021-Jan-16 06:03:19 2021-Jan-16 06:03
2169-Apr-07 18:18 < 00:01 Earth 0.225733481923999 0.225733047547871 0.225733916361435 15.114957173282 15.1141762278757 2513368.262371507 0.303638076248853 211.036564395783 10.1391959300961 -84.7872736085838 3291005.79591522 T 198 CATAB v2.0f-lin.ifort 2021-Jan-16 06:03:19 2021-Jan-16 06:03
2186-Jul-23 19:33 00:01 Earth 0.28047349158598 0.280469572901086 0.280477410271416 10.9653974615214 10.9645310717527 2519684.314825864 1.16444794976409 196.355805517822 9.00714716398915 -5.5703371686087 827813.583160329 T 198 CATAB v2.0f-lin.ifort 2021-Jan-16 06:03:19 2021-Jan-16 06:03
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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