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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 58 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05600496121871852 1.9411e-08  
a 3.240237933193438 8.319e-09 au
q 3.058768533405519 6.1144e-08 au
i 4.220372017058254 5.5043e-07 deg
node 349.9491996386438 8.3295e-06 deg
peri 206.81016586794 1.6787e-05 deg
M 75.20940631913517 1.589e-05 deg
tp 2458755.424755038593
(2019-Sep-28.92475504)
9.4098e-05 TDB
period 2130.412883545669
5.83
8.2045e-06
2.246e-08
d
yr
n .1689813288215044 6.5077e-10 deg/d
Q 3.421707332981357 8.7849e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3158  
   data-arc span      51556 days (141.15 yr)  
   first obs. used      1880-01-26  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44838  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 17:52:01  

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

[ 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
1965-Mar-06 11:54 < 00:01 Jupiter 1.83988962258228 1.83988924293352 1.83989000223105 3.00400690787677 2.84663408737871 2438825.995793268 0.744062475195349 14.7689661201943 6.48316882288344 30.2690500825308 5498202.03120481 T 58 CATAB v2.0g-lin.ifort 2021-May-03 17:53:36 2021-May-03 17:53
1976-Jun-17 16:57 < 00:01 Jupiter 1.69670092752348 1.69670062609282 1.69670122895413 2.51263997409939 2.30541210511124 2442947.206302697 0.580565940900552 8.44912122450913 7.62087759548151 65.5004503248021 4734908.65456742 T 58 CATAB v2.0g-lin.ifort 2021-May-03 17:53:36 2021-May-03 17:53
1987-Oct-22 14:20 < 00:01 Jupiter 1.59635047104016 1.59635024229863 1.59635069978159 2.28312872596854 2.03751763019242 2447091.097414628 0.394841883484132 13.2463535498753 4.41499055905198 87.0789127364005 6491593.79004239 T 58 CATAB v2.0g-lin.ifort 2021-May-03 17:53:36 2021-May-03 17:53
1999-Mar-20 00:24 < 00:01 Jupiter 1.54962094985303 1.54962075379384 1.54962114591223 2.25181234854601 1.99435684879434 2451257.516930337 0.218689623330248 18.0068484642764 2.65013262836438 88.5450339306915 8317128.79683083 T 58 CATAB v2.0g-lin.ifort 2021-May-03 17:53:36 2021-May-03 17:53
2010-Aug-23 23:43 < 00:01 Jupiter 1.55090105497215 1.55090086543429 1.55090124450993 2.33685349166389 2.09011649188758 2455432.488419029 0.0884303888073829 15.2536509395293 2.81672011500646 -88.0782346196048 8888037.75621303 T 58 CATAB v2.0g-lin.ifort 2021-May-03 17:53:36 2021-May-03 17:53
2022-Jan-20 07:56 < 00:01 Jupiter 1.60627930258313 1.60627910696796 1.6062794981982 2.52779348005391 2.30978369935653 2459599.830747206 0.139851017589059 12.7678874580368 4.73177929313879 -88.5297298385187 7566082.0483863 T 58 CATAB v2.0g-lin.ifort 2021-May-03 17:53:36 2021-May-03 17:53
2033-May-30 03:51 < 00:01 Jupiter 1.71735210836772 1.71735188523364 1.71735233150169 2.84153179045348 2.66230622592445 2463747.660675516 0.26623797590915 10.0361050942079 7.57988008027825 87.3806932269595 7188476.99757731 T 58 CATAB v2.0g-lin.ifort 2021-May-03 17:53:36 2021-May-03 17:53
2044-Sep-13 14:35 < 00:01 Jupiter 1.88114067271339 1.88114040233152 1.88114094309526 3.30874673401132 3.16974187706763 2467872.107565129 0.384225305230976 11.2388075519396 6.10430672264309 14.1818094096381 7004423.33539611 T 58 CATAB v2.0g-lin.ifort 2021-May-03 17:53:36 2021-May-03 17:53
2179-Jul-19 17:32 00:01 Jupiter 1.92694866479814 1.92694806738098 1.9269492622153 3.3053012244666 3.16952405532143 2517123.230399066 1.16120630311085 25.9320162148546 3.99750836587106 30.3067930265251 7890291.55461188 T 58 CATAB v2.0g-lin.ifort 2021-May-03 17:53:36 2021-May-03 17:53
2190-Oct-27 19:54 00:01 Jupiter 1.77658040154513 1.77657983421943 1.77658096887072 2.67320093962175 2.48846553214028 2521241.329411610 1.18475610959788 19.9288296663338 5.354462056306 42.7503646438158 5265539.7400288 T 58 CATAB v2.0g-lin.ifort 2021-May-03 17:53:36 2021-May-03 17:53
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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