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117 Lomia (A871 RB)
Classification: Main-belt Asteroid          SPK-ID: 2000117
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 105 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02597218685797529 3.7696e-08  
a 2.995292719428172 9.1287e-09 au
q 2.917498417224851 1.1234e-07 au
i 14.90710819324238 4.3557e-06 deg
node 348.6712983092211 1.5393e-05 deg
peri 49.28508314361457 8.8325e-05 deg
M 265.492565704168 8.7539e-05 deg
tp 2459697.573722961483
(2022-Apr-28.07372296)
0.0004614 TDB
period 1893.465224185288
5.18
8.656e-06
2.37e-08
d
yr
n .1901276006560402 8.6917e-10 deg/d
Q 3.073087021631493 9.3658e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2770  
   data-arc span      52700 days (144.28 yr)  
   first obs. used      1876-08-16  
   last obs. used      2020-11-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41057  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:19:05  

Additional Information
 Earth MOID = 1.93021 au 
 Jupiter MOID = 2.03161 au 
 T_jup = 3.203 
[ hide covariance matrix ]
Orbital Elements at Epoch 2454622.5 (2008-Jun-05.0) TDB
Reference: JPL 105 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02847411265329189 3.6696e-08  
q 2.905472275986496 1.0856e-07 au
tp 2454093.818898199400
(2006-Dec-24.31889820)
0.00042111 TDB
node 348.9738788344828 1.5372e-05 deg
peri 61.68426917955049 8.2535e-05 deg
i 14.92961514639657 4.359e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2770  
   data-arc span      52700 days (144.28 yr)  
   first obs. used      1876-08-16  
   last obs. used      2020-11-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41057  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:19:05  

Additional Information
 Jupiter MOID = 2.03161 au 
 T_jup = 3.203 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.346561552867297E-15 -3.972180246600415E-15 -1.152817169248143E-12 -1.614682480312448E-15 -2.450499927952223E-13 -2.410090995917582E-15
q -3.972180246600415E-15 1.178634324481113E-14 4.024508071019472E-12 3.432855700154434E-15 8.455241444575791E-13 7.059969961794025E-15
tp -1.152817169248143E-12 4.024508071019472E-12 1.77333931201015E-7 1.488241326418086E-11 3.416791812804073E-8 -2.342518492267586E-11
node -1.614682480312448E-15 3.432855700154434E-15 1.488241326418086E-11 2.362921912828851E-10 -2.247217554765043E-10 -1.50561977013309E-12
peri -2.450499927952223E-13 8.455241444575791E-13 3.416791812804073E-8 -2.247217554765043E-10 6.812104007251202E-9 -3.015078110532175E-12
i -2.410090995917582E-15 7.059969961794025E-15 -2.342518492267586E-11 -1.50561977013309E-12 -3.015078110532175E-12 1.900081763278293E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.08   n/a E2021B10 IRAS observations used: 12
diameter diameter 208.974 km 1.208 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 9.127 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Di Martino, M.; Dotto, E.; Celino, A.; Barucci, M.A.; Fulchignoni, M. (1995) Astron. Astrophys. Suppl. Ser. 112, 1-7.]
[Behrend, R. (2003) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2013) 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 0.027   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.687   0.017 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=7; phase (min.=6.21, mean=12.03, max.=17.45) deg.
U-B UB 0.306   0.033 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=7; phase (min.=6.32, mean=12.86, max.=17.45) deg.
Tholen spectral type spec_T XC   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
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)

117 Lomia (A871 RB)          Discovered 1871-Sep-12 by Borrelly, A. at Marseille
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A871 RB = A900 DA = A900 MC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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