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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 107 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1298386988044556 2.8501e-08  
a 3.461567484088851 1.0657e-08 au
q 3.012122066130941 1.0074e-07 au
i 7.584410087658042 3.1361e-06 deg
node 73.11273169938337 2.2283e-05 deg
peri 296.8740188849847 2.5529e-05 deg
M 281.2343020183191 1.3677e-05 deg
tp 2459515.185882523810
(2021-Oct-27.68588252)
9.0749e-05 TDB
period 2352.380826380353
6.44
1.0863e-05
2.974e-08
d
yr
n .1530364454440559 7.0671e-10 deg/d
Q 3.91101290204676 1.2041e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3904  
   data-arc span      54200 days (148.39 yr)  
   first obs. used      1872-06-07  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40533  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:33:11  

Additional Information
 Earth MOID = 2.02248 au 
 Jupiter MOID = 1.60425 au 
 T_jup = 3.106 
[ 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 7.3   n/a MPO473762 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. 2019-August); 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]
[Bin, L.; Haibin, Z.; Jingshen, Y. (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 1.59485972932034 1.59485931531977 1.59486014332127 1.58781538795117 1.20787710236467 2418279.544526516 2.00672847169683 203.1093245725 35.4352585884076 -57.0988789614835 3083282.71047674 T 107 CATAB v2.0f-lin.ifort 2020-Nov-13 04:33:22 2020-Nov-13 04:33
1923-Jan-18 00:40 00:02 Jupiter 1.60780753039253 1.60780712129342 1.60780793949164 2.17317030594606 1.91547186660796 2423437.527820882 1.60477833786259 88.1584027377115 19.3110366371226 84.8864330664126 2061268.36369254 T 107 CATAB v2.0f-lin.ifort 2020-Nov-13 04:33:22 2020-Nov-13 04:33
1936-Dec-28 08:02 00:01 Jupiter 1.82507596818877 1.8250754242294 1.82507651214856 3.4156975042142 3.27700842617159 2428530.834658104 1.26520211045695 62.5541761450749 10.7670047454246 72.1814650128073 4051828.3465253 T 107 CATAB v2.0f-lin.ifort 2020-Nov-13 04:33:22 2020-Nov-13 04:33
1950-Nov-13 20:56 < 00:01 Jupiter 1.97361229830265 1.97361195612266 1.97361264048276 4.35329851850546 4.25357033179518 2433599.371896503 0.963993532283814 42.9431623277915 12.7170238419599 78.3560708712829 5608947.48786694 T 107 CATAB v2.0f-lin.ifort 2020-Nov-13 04:33:22 2020-Nov-13 04:33
1964-Sep-13 01:02 < 00:01 Jupiter 1.87276579290445 1.87276546601793 1.87276611979093 4.28882113508086 4.18203517225824 2438651.543211159 0.736363596290613 38.2838417321926 14.209641814697 -85.4201867276799 5088809.90026263 T 107 CATAB v2.0f-lin.ifort 2020-Nov-13 04:33:22 2020-Nov-13 04:33
1978-Aug-06 11:35 < 00:01 Jupiter 1.68874526326545 1.68874490753956 1.68874561899124 2.79756787071716 2.61213470243193 2443726.982551649 0.601659003789423 36.8793285485878 9.50943592290052 -81.7256858817444 3077379.45459835 T 107 CATAB v2.0f-lin.ifort 2020-Nov-13 04:33:22 2020-Nov-13 04:33
1992-Sep-19 12:20 < 00:01 Jupiter 1.57799284736437 1.57799247526961 1.57799321945921 1.48311024752684 1.06116531698124 2448885.013639206 0.435845687458164 140.238063636035 79.2785251994316 -76.641291957424 2947869.15204949 T 107 CATAB v2.0f-lin.ifort 2020-Nov-13 04:33:22 2020-Nov-13 04:33
2006-Oct-07 09:21 < 00:01 Jupiter 1.64079011276678 1.64078979330169 1.64079043223187 2.54486514717342 2.33321275128286 2454015.889768139 0.236619298234985 63.1592719847029 8.15336643435012 81.6086175658887 3629516.7439033 T 107 CATAB v2.0f-lin.ifort 2020-Nov-13 04:33:22 2020-Nov-13 04:33
2020-Sep-12 20:32 < 00:01 Jupiter 1.88203993666895 1.88203959553179 1.8820402778061 3.65700210516444 3.53179179742751 2459105.355262896 0.29234640320687 29.8850461847726 13.0118633342619 76.4590240211302 4987351.11253363 T 107 CATAB v2.0f-lin.ifort 2020-Nov-13 04:33:22 2020-Nov-13 04:33
2034-Jul-26 05:31 < 00:01 Jupiter 1.96490518209383 1.96490485650867 1.96490550767898 4.51250207807215 4.41593976091713 2464169.729569695 0.464900712133015 36.133531742518 14.7929652210235 88.7466677579751 5758554.55155545 T 107 CATAB v2.0f-lin.ifort 2020-Nov-13 04:33:22 2020-Nov-13 04:33
2048-May-21 11:46 < 00:01 Jupiter 1.82090951843432 1.82090921991394 1.82090981695469 4.010088292516 3.89236163000343 2469217.990578435 0.663513531571349 34.891186242178 12.616639670511 -85.0461228599406 5131528.36705564 T 107 CATAB v2.0f-lin.ifort 2020-Nov-13 04:33:22 2020-Nov-13 04:33
2062-May-05 21:46 < 00:01 Jupiter 1.66543433079938 1.66543399402854 1.66543466757013 2.2050880807031 1.96092690350713 2474315.407023350 0.967048363804579 52.2240301826827 7.21068306828696 -72.4838037381599 3180866.05543166 T 107 CATAB v2.0f-lin.ifort 2020-Nov-13 04:33:22 2020-Nov-13 04:33
2076-Jun-27 14:51 00:01 Jupiter 1.56520004155901 1.56519969593972 1.56520038717847 1.77272848879597 1.43535631464323 2479482.119014010 1.22045945327483 131.64274661023 43.228379600512 76.9763400135977 2548988.9798298 T 107 CATAB v2.0f-lin.ifort 2020-Nov-13 04:33:22 2020-Nov-13 04:33
2090-Jun-24 20:17 00:01 Jupiter 1.69422139775895 1.69422104766714 1.69422174785114 2.82687552989339 2.64411220642175 2484592.344917831 1.41438330810746 75.2534250769568 8.33119333774153 83.1623097855119 3737070.37539538 T 107 CATAB v2.0f-lin.ifort 2020-Nov-13 04:33:22 2020-Nov-13 04:33
2104-May-30 16:55 00:02 Jupiter 1.93632501681747 1.93632468002766 1.93632535360739 3.94487586371319 3.83238427023376 2489680.204952923 1.63584911450749 61.8760741539742 13.4736245932442 84.9436321162165 5459377.82110093 T 107 CATAB v2.0f-lin.ifort 2020-Nov-13 04:33:22 2020-Nov-13 04:33
2118-Apr-03 04:25 00:02 Jupiter 1.93247234489883 1.93247195542623 1.93247273437176 4.57702902676473 4.48024264185334 2494735.683859450 1.79941415959865 77.9226209139128 14.7177538269294 -81.9897079328685 5755148.99851535 T 107 CATAB v2.0f-lin.ifort 2020-Nov-13 04:33:22 2020-Nov-13 04:33
2132-Feb-03 04:08 00:02 Jupiter 1.78505872360362 1.78505835579952 1.78505909140783 3.57935035724767 3.44423218806407 2499789.671898763 2.08393129476211 57.5721343133017 13.0051720367788 88.4280435741686 3732565.32471388 T 107 CATAB v2.0f-lin.ifort 2020-Nov-13 04:33:22 2020-Nov-13 04:33
2146-Feb-15 19:45 00:03 Jupiter 1.64033224154597 1.64033180544399 1.64033267764936 1.73107174103241 1.40137942936229 2504916.323090946 2.59361909922006 190.824724707399 20.3918610870385 -73.2723110610218 3487960.75475481 T 107 CATAB v2.0f-lin.ifort 2020-Nov-13 04:33:22 2020-Nov-13 04:33
2160-Mar-25 12:05 00:03 Jupiter 1.55714038463708 1.55714005534171 1.55714071393254 2.11047315384406 1.83471424968565 2510068.003264200 2.66324338142294 98.8596691526199 32.3253002684817 86.628891390412 1982296.87201987 T 107 CATAB v2.0f-lin.ifort 2020-Nov-13 04:33:22 2020-Nov-13 04:33
2174-Mar-14 12:25 00:03 Jupiter 1.77114749952151 1.77114683334257 1.77114816570277 3.07092552986994 2.91103351131708 2515170.017372424 2.88842651292994 120.875095626032 9.19252246355566 79.0211985145894 4086866.85221966 T 107 CATAB v2.0f-lin.ifort 2020-Nov-13 04:33:22 2020-Nov-13 04:33
2188-Feb-13 23:53 00:03 Jupiter 1.94933933685481 1.94933901674143 1.9493396569683 4.22572401189286 4.12161472631936 2520254.495101849 3.0152850824946 115.964440579363 14.2989565670192 -89.8779170825384 5597671.62583224 T 107 CATAB v2.0f-lin.ifort 2020-Nov-13 04:33:22 2020-Nov-13 04:33

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