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121 Hermione (A872 JA)
Classification: Outer Main-belt Asteroid          SPK-ID: 2000121
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 112 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .128617507998556 2.8639e-08  
a 3.462434213078099 1.2477e-08 au
q 3.017104552983052 1.0021e-07 au
i 7.569239658189151 3.1233e-06 deg
node 73.01624853322568 2.2301e-05 deg
peri 296.5796844126485 2.5547e-05 deg
M 312.0666327521992 1.3686e-05 deg
tp 2459513.833016991246
(2021-Oct-26.33301699)
9.0479e-05 TDB
period 2353.264387492495
6.44
1.272e-05
3.483e-08
d
yr
n .1529789860898696 8.2688e-10 deg/d
Q 3.907763873173146 1.4081e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3961  
   data-arc span      54228 days (148.47 yr)  
   first obs. used      1872-06-07  
   last obs. used      2020-11-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40257  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:19:58  

Additional Information
 Earth MOID = 2.02589 au 
 Jupiter MOID = 1.60893 au 
 T_jup = 3.107 
[ 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 7.37   n/a E2021B10 IRAS observations used: 16
diameter diameter 209.00 km 4.7 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 16
rotation period rot_per 5.55128 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Piironen, J.; Bowell, E.; Erikson, A.; Magnusson, P. (1994) Astron. Astrophys. Suppl. Ser. 106, 587-595.]
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Marchis, F.; Hestroffer, D.; Descamps, P.; Berthier, J.; et al. (2005) Icarus 178, 450-464.]
[Descampes, P.; Marchis, F.; Durech, J.; Emery, J.; et al. (2009) Icarus 203, 88-101.]
[Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Li, B.; Zhao, H.; Yao, J. (2011) Minor Planet Bull. 38, 179-180.]
[Sergison, D. (2011) www.gothersobservatory.org.uk/lightcurves.htm]
[Kaasalainen, M.; Viikinkoski, M. (2012) Astron. Astrophys. 543, A97.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
[Viikinkoski, M.; Hanus, J.; Kaasalainen, M.; Marchis, F.; Durech, J. (2017) Astron. Astrophys. 607, A117.]
geometric albedo albedo 0.0482   0.002 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 16
B-V BV 0.739   0.033 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=4.77, mean=13.89, max.=18.88) deg.
U-B UB 0.425   0.087 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=4.77, mean=13.89, max.=18.88) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B Ch   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

121 Hermione (A872 JA)          Discovered 1872-May-12 by Watson, J. C. at Ann Arbor
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
1908-Dec-04 01:04 00:02 Jupiter 1.59485973484068 1.59485932183253 1.59486014784918 1.58781537907531 1.20787709464782 2418279.544658250 1.99993690179082 202.589184993137 35.1987350626613 -57.0530286659875 3099275.18290235 T 112 CATAB v2.0f-lin.ifort 2021-Apr-12 10:20:58 2021-Apr-12 10:20
1923-Jan-18 00:40 00:02 Jupiter 1.60780759984545 1.60780719252831 1.60780800716259 2.17317030731642 1.91547188156274 2423437.527906199 1.59994649372019 87.9203395090207 19.2467503646898 84.8536461492177 2069456.01755808 T 112 CATAB v2.0f-lin.ifort 2021-Apr-12 10:20:58 2021-Apr-12 10:20
1936-Dec-28 08:02 00:01 Jupiter 1.82507597140571 1.82507542861615 1.82507651419569 3.41569776434593 3.27700869834459 2428530.834715807 1.26180872625745 62.3909365729426 10.7287336695994 72.1649428132355 4063605.01932552 T 112 CATAB v2.0f-lin.ifort 2021-Apr-12 10:20:58 2021-Apr-12 10:20
1950-Nov-13 20:56 < 00:01 Jupiter 1.97361229798505 1.97361195685041 1.9736126391198 4.35329848618574 4.25357029925885 2433599.371934594 0.961333674336349 42.8271130511484 12.6286219530994 78.260103876499 5637589.44019956 T 112 CATAB v2.0f-lin.ifort 2021-Apr-12 10:20:58 2021-Apr-12 10:20
1964-Sep-13 01:02 < 00:01 Jupiter 1.87276579887064 1.87276547340422 1.87276612433707 4.28882093569486 4.18203496872302 2438651.543265222 0.734064792265244 38.1545590121516 14.1537754164018 -85.4742247180424 5107906.71077882 T 112 CATAB v2.0f-lin.ifort 2021-Apr-12 10:20:58 2021-Apr-12 10:20
1978-Aug-06 11:35 < 00:01 Jupiter 1.68874524037596 1.68874488550683 1.6887455952451 2.79756799416112 2.61213483309721 2443726.982589367 0.599957242329299 36.7761995097331 9.48517950403811 -81.7303414334097 3084365.69618568 T 112 CATAB v2.0f-lin.ifort 2021-Apr-12 10:20:58 2021-Apr-12 10:20
1992-Sep-19 12:20 < 00:01 Jupiter 1.57799289980955 1.57799252914018 1.577993270479 1.48311012610886 1.06116516689045 2448885.013623571 0.435033976733936 139.83533979619 78.9914842847847 -76.725996141729 2959227.10017793 T 112 CATAB v2.0f-lin.ifort 2021-Apr-12 10:20:58 2021-Apr-12 10:20
2006-Oct-07 09:21 < 00:01 Jupiter 1.64079013705099 1.64078981837159 1.64079045573049 2.54486514318684 2.33321275143151 2454015.889752040 0.23532905183154 63.0023311273501 8.13033285961813 81.6018037222372 3637656.22476845 T 112 CATAB v2.0f-lin.ifort 2021-Apr-12 10:20:58 2021-Apr-12 10:20
2020-Sep-12 20:32 < 00:01 Jupiter 1.88203990323403 1.8820395634839 1.88204024298416 3.65700217675529 3.53179186999656 2459105.355249141 0.289386625538985 29.7851534913362 12.9728922653535 76.5216561525505 5008705.27181159 T 112 CATAB v2.0f-lin.ifort 2021-Apr-12 10:20:58 2021-Apr-12 10:20
2034-Jul-26 05:31 < 00:01 Jupiter 1.96490519439082 1.9649048697221 1.96490551905955 4.51250192716494 4.41593960786026 2464169.729607245 0.461979724871316 36.0341029884901 14.7557147217595 88.8281049961348 5781998.08197045 T 112 CATAB v2.0f-lin.ifort 2021-Apr-12 10:20:58 2021-Apr-12 10:20
2048-May-21 11:47 < 00:01 Jupiter 1.82090949241629 1.82090919419029 1.82090979064228 4.01008815971969 3.89236149214325 2469217.990678425 0.660273337628075 34.7798773433995 12.6034984840022 -85.0339259307679 5137298.6077133 T 112 CATAB v2.0f-lin.ifort 2021-Apr-12 10:20:58 2021-Apr-12 10:20
2062-May-05 21:46 < 00:01 Jupiter 1.66543429078768 1.66543395544464 1.66543462613072 2.20508809874834 1.96092691900093 2474315.407171773 0.962217544678704 52.0413216112302 7.18967207248307 -72.4998334176988 3198413.52772939 T 112 CATAB v2.0f-lin.ifort 2021-Apr-12 10:20:58 2021-Apr-12 10:20
2076-Jun-27 14:52 00:01 Jupiter 1.56520006562573 1.56519972159662 1.56520040965501 1.77272846450783 1.43535629252621 2479482.119251657 1.21384491224993 130.929968127884 43.1605053462651 76.9433791762835 2553069.29152721 T 112 CATAB v2.0f-lin.ifort 2021-Apr-12 10:20:58 2021-Apr-12 10:20
2090-Jun-24 20:17 00:01 Jupiter 1.69422146804463 1.69422111947751 1.69422181661222 2.8268760263389 2.6441127460706 2484592.345240375 1.40670620741102 74.8967611707728 8.30950253392716 83.1708286339556 3747332.74162018 T 112 CATAB v2.0f-lin.ifort 2021-Apr-12 10:20:58 2021-Apr-12 10:20
2104-May-30 16:56 00:02 Jupiter 1.93632506127566 1.9363247269639 1.93632539558753 3.94487639658886 3.83238482200215 2489680.205341191 1.62761475339547 61.6176696623544 13.4088522541684 85.0144203397854 5499063.43462333 T 112 CATAB v2.0f-lin.ifort 2021-Apr-12 10:20:58 2021-Apr-12 10:20
2118-Apr-03 04:25 00:02 Jupiter 1.93247228171262 1.93247189259452 1.93247267083106 4.57702877459021 4.48024238157275 2494735.684341105 1.79137011583668 77.6729765037042 14.6770369794073 -81.9424808152242 5772726.50563708 T 112 CATAB v2.0f-lin.ifort 2021-Apr-12 10:20:58 2021-Apr-12 10:20
2132-Feb-03 04:08 00:02 Jupiter 1.78505857601394 1.78505820890351 1.78505894312447 3.57934910040499 3.44423087128538 2499789.672540369 2.07506214859508 57.3392266462395 12.9847322551388 88.4194523277578 3739728.03811573 T 112 CATAB v2.0f-lin.ifort 2021-Apr-12 10:20:58 2021-Apr-12 10:20
2146-Feb-15 19:46 00:03 Jupiter 1.64033209258192 1.64033165951109 1.64033252565415 1.7310707364162 1.4013781569703 2504916.323930652 2.58214993788199 189.867237144443 20.272927250972 -73.3215431393269 3508170.13067712 T 112 CATAB v2.0f-lin.ifort 2021-Apr-12 10:20:58 2021-Apr-12 10:20
2160-Mar-25 12:06 00:03 Jupiter 1.55714047437221 1.5571401455301 1.55714080321451 2.11047414561822 1.83471540924768 2510068.004219135 2.65108428909449 98.6988388192129 32.2137053218413 86.6582767549162 1985930.98363064 T 112 CATAB v2.0f-lin.ifort 2021-Apr-12 10:20:58 2021-Apr-12 10:20
2174-Mar-14 12:27 00:03 Jupiter 1.77114779739284 1.77114713504921 1.77114845973878 3.07092697380721 2.91103506310095 2515170.018431467 2.87513815821156 120.313264680825 9.15479962721871 79.0387379614776 4100613.577732 T 112 CATAB v2.0f-lin.ifort 2021-Apr-12 10:20:58 2021-Apr-12 10:20
2188-Feb-13 23:55 00:03 Jupiter 1.94933939512504 1.94933907701593 1.94933971323427 4.22572537579189 4.12161612840334 2520254.496256333 3.00210580678355 115.508898314017 14.2297723569042 -89.8363925858399 5637751.50362907 T 112 CATAB v2.0f-lin.ifort 2021-Apr-12 10:20:58 2021-Apr-12 10:20

Alternate Designations
 A872 JA = 1970 VE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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