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108 Hecuba (A869 GB)
Classification: Outer Main-belt Asteroid          SPK-ID: 2000108
[ 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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 57 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0560049616781851 1.9414e-08  
a 3.240237929096886 8.5641e-09 au
q 3.058768528049613 6.1204e-08 au
i 4.220372014992907 5.5044e-07 deg
node 349.9491997091719 8.33e-06 deg
peri 206.8101638834817 1.6816e-05 deg
M 75.20940894444533 1.594e-05 deg
tp 2458755.424740346543
(2019-Sep-28.92474035)		 9.4361e-05 TDB
period 2130.412879505526
5.83		 8.4462e-06
2.312e-08		 d
yr
n .1689813291419628 6.6994e-10 deg/d
Q 3.421707330144159 9.0437e-09 au
   Orbit Determination Parameters
   # obs. used (total)      3144  
   data-arc span      51391 days (140.70 yr)  
   first obs. used      1880-01-26  
   last obs. used      2020-10-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4448  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:18:24  

Additional Information
 Earth MOID = 2.05717 au 
 Jupiter MOID = 1.54629 au 
 T_jup = 3.177 
[ 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 8.06   n/a E2021B10 IRAS observations used: 14
diameter diameter 75.498 km 1.891 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 14.256 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Blanco, C.; Di Martino, M.; Lazzarin, M.; Cellino, A.; et al. (1994) Seventy-Five Years of Hirayama Asteroid Families, ASP Conf. Ser. 63, 280-285.]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Pilcher, F. (2013) Minor Planet Bull. 40, 158-160.]
[Pilcher, F. (2014) Minor Planet Bull. 41, 250-252.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Behrend, R. (2016) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.148   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
B-V BV 0.855   0.013 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=2.51, mean=7.27, max.=10.66) deg.
U-B UB 0.502   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=2.51, mean=7.27, max.=10.66) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B Sl   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)

108 Hecuba (A869 GB)          Discovered 1869-Apr-02 by Luther, R. at Dusseldorf
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
1965-Mar-06 11:54 < 00:01 Jupiter 1.83988968767282 1.83988929628305 1.83989007906259 3.00400708445194 2.84663427943698 2438825.995884252 0.773203218994143 15.2466667470963 6.49007125727391 29.9168628615567 5434288.12376062 T 57 CATAB v2.0f-lin.ifort 2021-Apr-12 10:19:55 2021-Apr-12 10:19
1976-Jun-17 16:57 < 00:01 Jupiter 1.69670097083103 1.69670066279004 1.69670127887193 2.51264009270611 2.30541223990636 2442947.206381120 0.602938471732026 8.62696262384479 7.7322218992672 56.1146171588186 4678214.69458559 T 57 CATAB v2.0f-lin.ifort 2021-Apr-12 10:19:55 2021-Apr-12 10:19
1987-Oct-22 14:20 < 00:01 Jupiter 1.59635049108027 1.59635026042617 1.59635072173428 2.28312875419888 2.03751766509493 2447091.097472738 0.409971801831515 13.3938823318944 4.5366634460896 86.3278506599064 6419752.5657586 T 57 CATAB v2.0f-lin.ifort 2021-Apr-12 10:19:55 2021-Apr-12 10:19
1999-Mar-20 00:24 < 00:01 Jupiter 1.54962095446658 1.54962075826645 1.54962115066672 2.25181233694309 1.99435683650955 2451257.516955432 0.227183098971357 18.2835048342311 2.69193981757868 88.2796639768372 8233914.33544871 T 57 CATAB v2.0f-lin.ifort 2021-Apr-12 10:19:55 2021-Apr-12 10:19
2010-Aug-23 23:43 < 00:01 Jupiter 1.55090105425402 1.55090086469641 1.55090124381163 2.33685348325337 2.09011648236321 2455432.488425196 0.0903344950870276 15.3407815261072 2.8248985815018 -88.1652593726501 8867390.80733053 T 57 CATAB v2.0f-lin.ifort 2021-Apr-12 10:19:55 2021-Apr-12 10:19
2022-Jan-20 07:56 < 00:01 Jupiter 1.60627930568796 1.60627910998642 1.60627950138951 2.52779344665929 2.30978366325124 2459599.830745730 0.141436583432145 12.7801425169035 4.73780895346084 -88.4769295514603 7565115.93366773 T 57 CATAB v2.0f-lin.ifort 2021-Apr-12 10:19:55 2021-Apr-12 10:19
2033-May-30 03:51 < 00:01 Jupiter 1.71735212251768 1.71735189830373 1.71735234673162 2.84153182965352 2.66230626928984 2463747.660646228 0.272593937009865 10.0544753268154 7.63543152926272 88.1137370997658 7176244.67155231 T 57 CATAB v2.0f-lin.ifort 2021-Apr-12 10:19:55 2021-Apr-12 10:19
2044-Sep-13 14:35 < 00:01 Jupiter 1.88114069984805 1.88114042630018 1.88114097339592 3.3087467938707 3.16974194160111 2467872.107522928 0.395205449755335 11.3846743275921 6.10670583319925 13.9931424658454 6958687.38608319 T 57 CATAB v2.0f-lin.ifort 2021-Apr-12 10:19:55 2021-Apr-12 10:19
2179-Jul-19 17:32 00:01 Jupiter 1.92694856768521 1.92694795307371 1.9269491822966 3.30530073816415 3.16952354119722 2517123.230244984 1.20331292288648 26.6787885233506 4.00024733000903 30.2288764844496 7868731.79925994 T 57 CATAB v2.0f-lin.ifort 2021-Apr-12 10:19:55 2021-Apr-12 10:19
2190-Oct-27 19:54 00:01 Jupiter 1.77658031033407 1.77657972726889 1.77658089339915 2.6732005382154 2.48846509109834 2521241.329252888 1.22859537041168 20.4985359430998 5.36322588650158 42.5294912548796 5248563.30124525 T 57 CATAB v2.0f-lin.ifort 2021-Apr-12 10:19:55 2021-Apr-12 10:19
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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