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65 Cybele (A861 EB)
Classification: Outer Main-belt Asteroid          SPK-ID: 2000065
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 83 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1120460120270747 3.2389e-08  
a 3.42483772480515 9.4294e-09 au
q 3.041098315900853 1.1162e-07 au
i 3.564035517145046 3.7988e-06 deg
node 155.6183998525847 5.5625e-05 deg
peri 102.8303080522308 5.7883e-05 deg
M 323.0142324109846 1.7146e-05 deg
tp 2459238.343101988297
(2021-Jan-23.84310199)
0.00011074 TDB
period 2315.039602996284
6.34
9.5608e-06
2.618e-08
d
yr
n .1555048991533722 6.4221e-10 deg/d
Q 3.808577133709448 1.0486e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3870  
   data-arc span      58162 days (159.24 yr)  
   first obs. used      1861-03-12  
   last obs. used      2020-06-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45332  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:06:22  

Additional Information
 Earth MOID = 2.02868 au 
 Jupiter MOID = 1.25999 au 
 T_jup = 3.129 
[ 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 6.8   n/a MPO473761 IRAS observations used: 17
magnitude slope G 0.01   n/a PDS3 (MPC 17257) Fit
diameter diameter 237.26 km 4.2 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 17
rotation period rot_per 6.0814 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Schober, H.J.; Scaltriti, F.; Zappala, V.; Harris, A.W. (1980) Astron. Astrophys. 91, 1-6.]
[Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R.; Greenberg, R.; et al. (1987) Icarus 70, 191-245.]
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Pilcher, F.; Stephens, R.D. (2010) Minor Planet Bull. 37, 8.]
[Pilcher, F. (2012) Minor Planet Bull. 39, 57-60.]
[Pilcher, F. (2014) Minor Planet Bull. 41, 250-252.]
[Franco, L.; Pilcher, F. (2015) Minor Planet Bull. 42, 204-206.]
[Behrend, R. (2016) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Viikinkoski, M.; Hanus, J.; Kaasalainen, M.; Marchis, F.; Durech, J. (2017) Astron. Astrophys. 607, A117.]
geometric albedo albedo 0.0706   0.003 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 17
B-V BV 0.690   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=17; phase (min.=1.75, mean=10.38, max.=18.00) deg.
U-B UB 0.271   0.024 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=7; phase (min.=1.75, mean=4.51, max.=10.04) deg.
Tholen spectral type spec_T P   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B Xc   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)

65 Cybele (A861 EB)          Discovered 1861-Mar-08 by Tempel, E. W. at Marseille
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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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
1927-May-03 06:10 00:01 Jupiter 1.57626573823578 1.57626498372548 1.57626649274616 2.50648302335852 2.28204660146206 2425003.756744698 1.30798008423446 62.3821943287564 9.839487849998 -78.0043131260581 2320101.71416225 T 83 CATAB v2.0f-lin.ifort 2020-Jun-23 15:06:48 2020-Jun-23 15:06
1941-Mar-02 07:22 00:01 Jupiter 1.19838145061479 1.19838109852347 1.19838180270611 0.927580721911394 n/a 2430055.807039759 1.05308554203233 52.9887242797462 17.5136628035306 88.5814076708167 10229423.416301 F 83 CATAB v2.0f-lin.ifort 2020-Jun-23 15:06:48 2020-Jun-23 15:06
1954-Dec-28 23:55 < 00:01 Jupiter 1.48277877816889 1.48277824573215 1.48277931060462 1.49817654982709 1.04978713058678 2435105.496556322 0.827128169968942 142.571232070637 79.18310361949 -18.2646597079003 1766894.76254402 T 83 CATAB v2.0f-lin.ifort 2020-Jun-23 15:06:48 2020-Jun-23 15:06
1968-Sep-14 10:39 < 00:01 Jupiter 1.97036449535724 1.97036407503031 1.97036491568418 3.38865934648492 3.25933273945544 2440113.943552139 0.54050461576109 40.8680157105216 15.268478093445 -80.0854846112138 4093151.32891109 T 83 CATAB v2.0f-lin.ifort 2020-Jun-23 15:06:48 2020-Jun-23 15:06
2009-Feb-22 11:37 < 00:01 Jupiter 1.94677242030056 1.94677201942998 1.94677282117104 4.04706710481963 3.93809228076414 2454884.984139529 0.171593450262559 27.0004277103668 16.9715557161163 -80.4573756553639 4322101.79797646 T 83 CATAB v2.0f-lin.ifort 2020-Jun-23 15:06:48 2020-Jun-23 15:06
2022-Nov-12 13:45 < 00:01 Jupiter 1.44637633691748 1.44637593785202 1.44637673598269 2.00772100833027 1.69106762845752 2459896.073088860 0.351554701388513 44.1349256786297 20.1753537019684 87.4605594708099 2532469.76929631 T 83 CATAB v2.0f-lin.ifort 2020-Jun-23 15:06:48 2020-Jun-23 15:06
2036-Sep-07 06:30 < 00:01 Jupiter 1.21956976232826 1.21956938268679 1.21957014196978 0.777721631788985 n/a 2464943.770859883 0.559740966228414 36.4496571239571 16.9658735609739 -74.9085541554718 10460038.2704818 F 83 CATAB v2.0f-lin.ifort 2020-Jun-23 15:06:48 2020-Jun-23 15:06
2050-Jul-04 07:01 < 00:01 Jupiter 1.59703133209972 1.59703074591322 1.59703191828577 1.91712534944122 1.61697969485672 2469991.792252260 0.801464632435719 50.135832273707 28.9345565958532 86.7774316632898 1797136.29996826 T 83 CATAB v2.0f-lin.ifort 2020-Jun-23 15:06:48 2020-Jun-23 15:06
2104-Aug-20 20:20 00:02 Jupiter 1.83480707886928 1.83480612347739 1.83480803426148 3.65003778894961 3.5212914518591 2489762.347562760 1.53288401097409 68.7031059617911 19.1084604656587 -58.0629083012455 2837664.41486187 T 83 CATAB v2.0f-lin.ifort 2020-Jun-23 15:06:48 2020-Jun-23 15:06
2118-May-31 05:13 00:02 Jupiter 1.34501157010801 1.34501074530234 1.34501239491131 1.52887201408974 1.03824247429768 2494793.717642725 1.9569982734599 266.680316690421 69.9098043054122 17.0537723461507 1307385.51077323 T 83 CATAB v2.0f-lin.ifort 2020-Jun-23 15:06:48 2020-Jun-23 15:06
2132-Mar-24 15:21 00:02 Jupiter 1.27524830114454 1.27524752778724 1.27524907450187 0.857058142244167 n/a 2499840.139409389 2.15413119967814 43.9253518940359 34.950853670885 52.2234878884138 5066769.36740829 F 83 CATAB v2.0f-lin.ifort 2020-Jun-23 15:06:48 2020-Jun-23 15:06
2146-Jan-11 02:48 00:02 Jupiter 1.72957207153709 1.72957083390171 1.72957330917317 2.38881726181582 2.17416394334235 2504880.616444106 2.2407546632863 100.697712690617 10.5898948912754 -78.6964725140433 2140994.3890072 T 83 CATAB v2.0f-lin.ifort 2020-Jun-23 15:06:48 2020-Jun-23 15:06
2200-Feb-25 20:11 00:03 Jupiter 1.69867298561884 1.69867131104756 1.69867466019283 3.123697966856 2.95976577463854 2524649.341313321 3.01458260252737 143.651412303359 16.723896185689 -66.5473643282711 2531115.97417213 T 83 CATAB v2.0f-lin.ifort 2020-Jun-23 15:06:48 2020-Jun-23 15:06

Alternate Designations
 A861 EB = 1949 YQ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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