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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 116 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2857255632660349 1.5964e-08  
a 2.650664994590291 3.6343e-09 au
q 1.893302245981419 4.3566e-08 au
i 2.837815034059633 6.1912e-07 deg
node 173.4964504868639 7.7787e-06 deg
peri 199.9400217160381 7.7411e-06 deg
M 295.806401266533 5.5197e-06 deg
tp 2459481.573507576264
(2021-Sep-24.07350758)
2.4579e-05 TDB
period 1576.270293671852
4.32
3.2419e-06
8.876e-09
d
yr
n .2283872261282015 4.6972e-10 deg/d
Q 3.408027743199164 4.6728e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3585  
   data-arc span      59516 days (162.95 yr)  
   first obs. used      1857-10-20  
   last obs. used      2020-10-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45615  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 17:46:26  

Additional Information
 Earth MOID = .892758 au 
 Jupiter MOID = 2.05625 au 
 T_jup = 3.329 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.32   n/a E2021B10 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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