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110 Lydia (A870 HA)
Classification: Main-belt Asteroid          SPK-ID: 2000110
[ 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 94 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08111494370355615 2.3367e-08  
a 2.734107142115517 6.2178e-09 au
q 2.512330195203326 6.5665e-08 au
i 5.95920266322285 4.145e-07 deg
node 56.81839663918135 2.9963e-06 deg
peri 282.1847173106542 9.7319e-06 deg
M 338.7955245112335 8.203e-06 deg
tp 2459297.762796988758
(2021-Mar-24.26279699)		 3.7644e-05 TDB
period 1651.283802539815
4.52		 5.6329e-06
1.542e-08		 d
yr
n .2180121911486623 7.4369e-10 deg/d
Q 2.955884089027708 6.7221e-09 au
   Orbit Determination Parameters
   # obs. used (total)      2604  
   data-arc span      9519 days (26.06 yr)  
   first obs. used      1994-11-04  
   last obs. used      2020-11-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .37867  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:18:29  

Additional Information
 Earth MOID = 1.51027 au 
 Jupiter MOID = 2.34177 au 
 T_jup = 3.340 
[ 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 7.85   n/a E2021B10 IRAS observations used: 15
magnitude slope G 0.20   n/a PDS3 (MPC 17257) Fit
diameter diameter 86.09 km 2.0 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 15
rotation period rot_per 10.927 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Taylor, R.C.; Gehrels, T.; Silvester, A.B. (1971) Astron. J. 76, 141-146.]
[Pray, D. (2004) Minor Planet Bull. 31, 34-36.]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Kaasalainen, M.; Marciniak, A.; et al. (2007) Astron. Astrophys. 465, 331-337.]
[Behrend, R. (2008) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Warner, B.D.; Stephens, R.D.; Harris, A.W.; Shepard, M.K. (2009) Minor Planet Bull. 36, 38-39.]
[Stephens, Robert D.; Warner, Brian D. (2013) Minor Planet Bull. 40, 93-94.]
[Warner, B.D. (2014) Minor Planet Bull. 41, 144-155.]
[Behrend, R. (2015) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.1808   0.009 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 15
B-V BV 0.705   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=25; phase (min.=.52, mean=7.62, max.=19.59) deg.
U-B UB 0.298   0.031 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=14; phase (min.=.52, mean=7.70, max.=19.59) deg.
Tholen spectral type spec_T M   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B X   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)

110 Lydia (A870 HA)          Discovered 1870-Apr-19 by Borrelly, A. at Marseille
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A870 HA = 1972 YS1 = A899 VA 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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