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57394 (2001 RD84)
Classification: Main-belt Asteroid          SPK-ID: 2057394
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05844850683244742 4.3532e-08  
a 2.324660920786718 9.0624e-09 au
q 2.188787961074992 1.0511e-07 au
i 3.649615568784437 4.109e-06 deg
node 321.7645537952861 7.1487e-05 deg
peri 140.8228597247558 9.146e-05 deg
M 51.13102165991169 5.3237e-05 deg
tp 2459016.626213755332
(2020-Jun-16.12621376)
0.00019148 TDB
period 1294.606696661786
3.54
7.5703e-06
2.073e-08
d
yr
n .2780767324379516 1.6261e-09 deg/d
Q 2.460533880498444 9.5921e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1033  
   data-arc span      8066 days (22.08 yr)  
   first obs. used      1998-12-17  
   last obs. used      2021-01-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51757  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 19:23:15  

Additional Information
 Earth MOID = 1.20689 au 
 Jupiter MOID = 2.60069 au 
 T_jup = 3.570 
[ 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 15.61   n/a E2021B10  
diameter diameter 2.023 km 0.414 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 6.74 h n/a LCDB (Rev. 2020-October); 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:
[Polishook, D.; Ofek, E.O.; Waszczak, A.; Kulkarni, S.R.; et al. (2012). Mon. Not. Royal Ast. Soc. 421, 2094-2108.]
[Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.299   0.137 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

57394 (2001 RD84)          Discovered 2001-Sep-11 by LONEOS at Anderson Mesa
Reference: 20030318/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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