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4858 Vorobjov (1985 UA)
Classification: Main-belt Asteroid          SPK-ID: 2004858
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .109540978545117 4.7904e-08  
a 2.182569542774901 1.0725e-08 au
q 1.94348873931657 1.0807e-07 au
i 3.274731990648852 5.7039e-06 deg
node 329.9978307867009 9.4093e-05 deg
peri 125.3003587400092 0.00010167 deg
M 75.98969894304545 3.3536e-05 deg
tp 2457151.899048991746
(2015-May-09.39904899)
0.00011001 JED
period 1177.743083704665
3.22
8.6807e-06
2.377e-08
d
yr
n .3056693815323435 2.253e-09 deg/d
Q 2.421650346233232 1.1899e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1318  
   data-arc span      10739 days (29.40 yr)  
   first obs. used      1985-10-20  
   last obs. used      2015-03-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .4784  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Oct-05 13:25:19  

Additional Information
 Earth MOID = .962093 au 
 Jupiter MOID = 2.71206 au 
 T_jup = 3.669 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.2 mag n/a MPO332864  
rotation period rot_per 11.7795 h n/a LCDB (Rev. 2015-December); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

4858 Vorobjov           Discovered 1985 Oct. 23 by J. Gibson at Palomar.
Amateur astronomer Tomas Vorobjov (b. 1984) is an assiduous observer of minor planets and a participant in the International Astronomical Search Collaboration. He has been responsible for verifying student asteroid discoveries and taking follow-up images to complete the discovery process. Name suggested by S. Foglia.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20110715/MPCPages.arcLast Updated: 2011-07-20

Alternate Designations
 1985 UA = 1988 RV6 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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