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50 Virginia (A857 TA)
Classification: Main-belt Asteroid          SPK-ID: 2000050
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 113 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2858620914926792 2.799e-08  
a 2.649431521729688 3.9729e-09 au
q 1.892059485661407 7.4116e-08 au
i 2.837908742363431 3.198e-06 deg
node 173.5208668534536 6.6993e-05 deg
peri 200.0119475007271 6.7221e-05 deg
M 250.0164934299236 7.2745e-06 deg
tp 2459481.729826226399
(2021-Sep-24.22982623)		 3.2586e-05 TDB
period 1575.170158182958
4.31		 3.543e-06
9.7e-09		 d
yr
n .2285467370809507 5.1407e-10 deg/d
Q 3.406803557797968 5.1086e-09 au
   Orbit Determination Parameters
   # obs. used (total)      3539  
   data-arc span      59516 days (162.95 yr)  
   first obs. used      1857-10-20  
   last obs. used      2020-10-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45227  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:33:56  

Additional Information
 Earth MOID = .89299 au 
 Jupiter MOID = 2.05635 au 
 T_jup = 3.330 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455314.5 (2010-Apr-28.0) TDB
Reference: JPL 113 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2838532497484157 2.8112e-08  
q 1.899563996370323 7.4354e-08 au
tp 2454754.146398742350
(2008-Oct-14.64639874)		 2.6876e-05 TDB
node 173.6186835150315 6.7113e-05 deg
peri 200.1709112023146 6.7344e-05 deg
i 2.832782488520178 3.1944e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      3539  
   data-arc span      59516 days (162.95 yr)  
   first obs. used      1857-10-20  
   last obs. used      2020-10-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45227  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:33:56  

Additional Information
 Jupiter MOID = 2.05635 au 
 T_jup = 3.330 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.902660270586272E-16 -2.088695479191745E-15 1.962883653401955E-14 -3.485690786650768E-15 2.122118085581628E-14 9.985875460702978E-17
q -2.088695479191745E-15 5.528590776442587E-15 -2.159933456935458E-14 9.232334223129007E-15 -4.984163904321008E-14 -2.430268765862416E-16
tp 1.962883653401955E-14 -2.159933456935458E-14 7.223317487139276E-10 -4.241680358670481E-12 1.6411137104735E-10 6.993991996045635E-14
node -3.485690786650768E-15 9.232334223129007E-15 -4.241680358670481E-12 4.504107261837218E-9 -4.499091341790776E-9 2.630044215304926E-11
peri 2.122118085581628E-14 -4.984163904321008E-14 1.6411137104735E-10 -4.499091341790776E-9 4.535258192361554E-9 -2.624435728734039E-11
i 9.985875460702978E-17 -2.430268765862416E-16 6.993991996045635E-14 2.630044215304926E-11 -2.624435728734039E-11 1.020422747178072E-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 9.2   n/a MPO473760 IRAS observations used: 3
diameter diameter 84.074 km 0.242 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 14.315 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Shevchenko, V.G.; Piironen, J.; Erikson, A.; Bel'skaya, I.N.; et al. (1997) Planet. Space Sci. 45, 1615-1623.]
[Pilcher, F. (2009) Minor Planet Bull. 36, 25-27.]
[Pilcher, F. (2016) Minor Planet Bull. 43, 304-306.]
[Pilcher, F. (2018) Minor Planet Bull. 45, 246-247.]
[Pilcher, F. (2019) Minor Planet Bull. 46, 445-448.]
[Franco, L.; Pilcher, F. (2020) Minor Planet Bull. 47, 272-274.]
[Pilcher, F. (2020) Minor Planet Bull. 47, 344-346.]
geometric albedo albedo 0.050   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.703   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=2.19, mean=15.69, max.=23.71) deg.
U-B UB 0.347   0.045 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=2.19, mean=15.69, max.=23.71) deg.
Tholen spectral type spec_T X   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 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)

50 Virginia (A857 TA)          Discovered 1857-Oct-04 by Ferguson, J. at Washington
Independent discovery Oct. 19 by R. Luther, Dusseldorf, was announced first.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A857 TA = 1977 LU1 = A900 SB = A909 WA 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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