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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 62 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05643352771000554 1.949e-08  
a 3.245260633930542 8.2376e-09 au
q 3.062119128019432 6.1484e-08 au
i 4.222741892176305 5.5061e-07 deg
node 349.9046056717972 8.3021e-06 deg
peri 208.4665824098329 1.6413e-05 deg
M 106.6129994304591 1.5468e-05 deg
tp 2458764.116601067000
(2019-Oct-07.61660107)
9.1911e-05 TDB
period 2135.368339996618
5.85
8.1305e-06
2.226e-08
d
yr
n .1685891811997972 6.4191e-10 deg/d
Q 3.428402139841652 8.7025e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3424  
   data-arc span      51695 days (141.53 yr)  
   first obs. used      1880-01-26  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43467  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 06:12:51  

Additional Information
 Earth MOID = 2.06165 au 
 Jupiter MOID = 1.53954 au 
 T_jup = 3.176 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455400.5 (2010-Jul-23.0) TDB
Reference: JPL 62 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05131048006249796 1.8755e-08  
q 3.085637983819599 5.7449e-08 au
tp 2454437.066838352483
(2007-Dec-02.56683835)
0.00010815 TDB
node 350.3160287727736 8.224e-06 deg
peri 197.615149757514 1.8866e-05 deg
i 4.244645590434639 5.544e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3424  
   data-arc span      51695 days (141.53 yr)  
   first obs. used      1880-01-26  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43467  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 06:12:51  

Additional Information
 Jupiter MOID = 1.53954 au 
 T_jup = 3.176 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.517336056431163E-16 -1.067148170570562E-15 5.58962895967395E-13 -4.519838872855746E-14 1.178398074853606E-13 3.320335875825683E-15
q -1.067148170570562E-15 3.300410812313272E-15 -1.818934670695768E-12 1.318493325184682E-13 -3.59754449593948E-13 -1.011687192529554E-14
tp 5.58962895967395E-13 -1.818934670695768E-12 1.16963011158296E-8 -2.155495393232233E-11 1.845072320599697E-9 1.510477992934879E-11
node -4.519838872855746E-14 1.318493325184682E-13 -2.155495393232233E-11 6.763393002966801E-11 -6.794123779499298E-11 -2.640997570994522E-12
peri 1.178398074853606E-13 -3.59754449593948E-13 1.845072320599697E-9 -6.794123779499298E-11 3.559446613756808E-10 4.854689392460282E-12
i 3.320335875825683E-15 -1.011687192529554E-14 1.510477992934879E-11 -2.640997570994522E-12 4.854689392460282E-12 3.07357062760405E-13

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 1.83988965437325 1.83988927966646 1.83989002907993 3.00400701856045 2.84663420697579 2438825.995840181 0.730721807561558 14.5599315394414 6.47906770652661 30.3671966614766 5522620.84151941 T 62 CATAB v2.0g-lin.ifort 2021-Aug-25 06:14:26 2021-Aug-25 06:14
1976-Jun-17 16:57 < 00:01 Jupiter 1.69670094818631 1.69670064955587 1.69670124681674 2.51264004370702 2.30541218361282 2442947.206343406 0.57024312056955 8.37336410250735 7.56375251794993 69.9072433619225 4759626.25486416 T 62 CATAB v2.0g-lin.ifort 2021-Aug-25 06:14:26 2021-Aug-25 06:14
1987-Oct-22 14:20 < 00:01 Jupiter 1.59635048003773 1.59635025217422 1.59635070790124 2.28312872212513 2.03751762735348 2447091.097434663 0.387822455288505 13.1753567335104 4.36378963099033 87.4109735325251 6531327.59562406 T 62 CATAB v2.0g-lin.ifort 2021-Aug-25 06:14:26 2021-Aug-25 06:14
1999-Mar-20 00:24 < 00:01 Jupiter 1.54962095108138 1.54962075522645 1.54962114693631 2.25181233407835 1.99435683267628 2451257.516945260 0.214836101219121 17.8856730980094 2.632247914005 88.6563122997708 8366266.16405491 T 62 CATAB v2.0g-lin.ifort 2021-Aug-25 06:14:26 2021-Aug-25 06:14
2010-Aug-23 23:43 < 00:01 Jupiter 1.55090105325832 1.55090086399225 1.55090124252438 2.33685347865572 2.09011647705506 2455432.488422887 0.0876945144444931 15.2119188950197 2.81049416740033 -88.0546915056642 8906122.62376815 T 62 CATAB v2.0g-lin.ifort 2021-Aug-25 06:14:26 2021-Aug-25 06:14
2022-Jan-20 07:56 < 00:01 Jupiter 1.6062793024069 1.60627910742047 1.60627949739324 2.52779349162868 2.30978371199875 2459599.830738435 0.1384412486505 12.7538124528205 4.71368855552038 -88.6236849616794 7581051.8544326 T 62 CATAB v2.0g-lin.ifort 2021-Aug-25 06:14:26 2021-Aug-25 06:14
2033-May-30 03:51 < 00:01 Jupiter 1.71735211329471 1.71735189176102 1.7173523348284 2.84153179182416 2.6623062279189 2463747.660664113 0.2620842771506 10.0283285758818 7.51393515603965 87.1048321500655 7224358.26564541 T 62 CATAB v2.0g-lin.ifort 2021-Aug-25 06:14:26 2021-Aug-25 06:14
2044-Sep-13 14:35 < 00:01 Jupiter 1.88114068404963 1.88114041651789 1.88114095158127 3.30874674293463 3.1697418872383 2467872.107547709 0.377560018951938 11.1094467385097 6.10195412155638 14.202346035644 7054307.92178541 T 62 CATAB v2.0g-lin.ifort 2021-Aug-25 06:14:26 2021-Aug-25 06:14
2179-Jul-19 17:32 00:01 Jupiter 1.9269486181876 1.92694802963825 1.92694920673695 3.30530089212783 3.1695237053912 2517123.230313874 1.14050505574145 25.5495234930393 3.99481087838803 30.3566606456986 7905964.89129819 T 62 CATAB v2.0g-lin.ifort 2021-Aug-25 06:14:26 2021-Aug-25 06:14
2190-Oct-27 19:54 00:01 Jupiter 1.77658035735656 1.77657979790352 1.7765809168095 2.67320069526831 2.48846526488141 2521241.329328203 1.16338961781604 19.6517782661388 5.34582139708919 42.8966400919766 5278339.85349141 T 62 CATAB v2.0g-lin.ifort 2021-Aug-25 06:14:26 2021-Aug-25 06:14
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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