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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 88 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0813632683813964 6.5114e-09  
a 2.733551157526 3.5391e-09 au
q 2.511140501061935 1.9842e-08 au
i 5.962488936363808 1.5918e-07 deg
node 56.86235061450301 1.0837e-06 deg
peri 282.5433181000892 3.6274e-06 deg
M 294.8461639236739 3.0726e-06 deg
tp 2459299.262940985942
(2021-Mar-25.76294099)
1.4018e-05 TDB
period 1650.780141770035
4.52
3.2058e-06
8.777e-09
d
yr
n .2180787076914998 4.2351e-10 deg/d
Q 2.955961813990064 3.827e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2580  
   data-arc span      9335 days (25.56 yr)  
   first obs. used      1994-11-04  
   last obs. used      2020-05-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .38991  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2020-Jun-25 10:55:29  

Additional Information
 Earth MOID = 1.51103 au 
 Jupiter MOID = 2.34486 au 
 T_jup = 3.341 
[ 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 7.9   n/a MPO473761 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. 2019-August); 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

[ 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
2005-Aug-09 22:19 < 00:01 Europ 0.0483674246126698 0.0483665295746941 0.0483683196517681 3.11039037219088 3.11039030154223 2453592.429856825 0.62196412923715 46.8862484280406 26.8403886722312 -22.1934826640151 175268.105285808 T 88 CATAB v2.0f-lin.ifort 2020-Jun-25 11:02:01 2020-Jun-25 11:02

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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