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91505 (1999 RA158)
Classification: Main-belt Asteroid          SPK-ID: 2091505
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1718978429993158 3.4389e-08  
a 2.647077762175237 1.3712e-08 au
q 2.192050804605858 9.0952e-08 au
i 13.20996325292124 4.3469e-06 deg
node 356.9182011700859 1.8688e-05 deg
peri 53.73617052571622 2.3398e-05 deg
M 243.8134654115776 1.532e-05 deg
tp 2459508.193699702109
(2021-Oct-20.69369970)
6.8555e-05 TDB
period 1573.071548611034
4.31
1.2223e-05
3.346e-08
d
yr
n .2288516376244088 1.7783e-09 deg/d
Q 3.102104719744616 1.607e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1140  
   data-arc span      9922 days (27.16 yr)  
   first obs. used      1993-04-18  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47092  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 00:39:59  

Additional Information
 Earth MOID = 1.22771 au 
 Jupiter MOID = 2.447 au 
 T_jup = 3.334 
[ show covariance matrix ]

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 14.1   n/a MPO385379  
diameter diameter 4.572 km 0.333 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.52 h n/a LCDB (Rev. 2019-August); 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:
[Behrend, R. (2012) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.233   0.066 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91505 (1999 RA158)          Discovered 1999-Sep-09 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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