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868 Lova (A917 HB)
Classification: Main-belt Asteroid          SPK-ID: 2000868
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 54 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1483087521831442 3.4795e-08  
a 2.704108525957179 8.6005e-09 au
q 2.303065564704668 9.4338e-08 au
i 5.838626852266147 3.6503e-06 deg
node 115.7789512557338 3.7277e-05 deg
peri 286.7413903915153 3.9341e-05 deg
M 224.4826161642594 1.4357e-05 deg
tp 2459611.902360795425
(2022-Feb-01.40236080)
6.6212e-05 TDB
period 1624.181663314429
4.45
7.7486e-06
2.121e-08
d
yr
n .2216500827040225 1.0574e-09 deg/d
Q 3.10515148720969 9.876e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2932  
   data-arc span      37673 days (103.14 yr)  
   first obs. used      1917-04-26  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4365  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:22:00  

Additional Information
 Earth MOID = 1.32014 au 
 Jupiter MOID = 2.30136 au 
 T_jup = 3.343 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455878.5 (2011-Nov-13.0) TDB
Reference: JPL 54 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .148258681504929 3.5041e-08  
q 2.302376395620227 9.4793e-08 au
tp 2456369.372830391292
(2013-Mar-17.87283039)
5.9727e-05 TDB
node 115.8120147612433 3.7323e-05 deg
peri 287.5678477610089 3.9354e-05 deg
i 5.835437192401551 3.6491e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2932  
   data-arc span      37673 days (103.14 yr)  
   first obs. used      1917-04-26  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4365  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:22:00  

Additional Information
 Jupiter MOID = 2.30136 au 
 T_jup = 3.343 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.227861846181511E-15 -3.311215609992835E-15 3.397107899615201E-13 -3.586486357777115E-15 5.015964016149604E-14 5.707401569746161E-16
q -3.311215609992835E-15 8.985632619159191E-15 -8.076278551395726E-13 1.039827772909934E-14 -1.190943452117978E-13 -1.473777299046373E-15
tp 3.397107899615201E-13 -8.076278551395726E-13 3.567278036097931E-9 -1.179841864737406E-11 7.618483491594261E-10 -8.392971008720041E-13
node -3.586486357777115E-15 1.039827772909934E-14 -1.179841864737406E-11 1.393033713242413E-9 -1.38780603543482E-9 -1.714806426643638E-11
peri 5.015964016149604E-14 -1.190943452117978E-13 7.618483491594261E-10 -1.38780603543482E-9 1.548737224787215E-9 1.685802768201384E-11
i 5.707401569746161E-16 -1.473777299046373E-15 -8.392971008720041E-13 -1.714806426643638E-11 1.685802768201384E-11 1.331603406367883E-11

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 10.3   n/a MPO473774 IRAS observations used: 11
diameter diameter 50.692 km 0.191 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 41.118 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Polakis, T. (2018) Minor Planet Bull. 45, 199-203.]
geometric albedo albedo 0.056   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.711   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=2.94 deg.
U-B UB 0.362   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=2.94 deg.
Tholen spectral type spec_T C:   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices
SMASSII spectral type spec_B Ch   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)

868 Lova (A917 HB)          Discovered 1917-Apr-26 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A917 HB = 1925 FB = 1957 EO 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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