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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1718978458428849 3.5795e-08  
a 2.647077762766357 1.398e-08 au
q 2.192050797568217 9.4074e-08 au
i 13.2099639814892 4.5753e-06 deg
node 356.9182012778987 1.8694e-05 deg
peri 53.7361693978734 2.3548e-05 deg
M 243.8134660523818 1.536e-05 deg
tp 2459508.193697072083
(2021-Oct-20.69369707)
6.868e-05 TDB
period 1573.07154913796
4.31
1.2462e-05
3.412e-08
d
yr
n .2288516375477513 1.813e-09 deg/d
Q 3.102104727964497 1.6384e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1106  
   data-arc span      9568 days (26.20 yr)  
   first obs. used      1993-04-18  
   last obs. used      2019-06-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4718  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 22:32:20  

Additional Information
 Earth MOID = 1.22771 au 
 Jupiter MOID = 2.447 au 
 T_jup = 3.334 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457204.5 (2015-Jul-01.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1739893775603662 3.5852e-08  
q 2.18357644008538 9.4292e-08 au
tp 2457937.260053732443
(2017-Jul-02.76005373)
6.3586e-05 TDB
node 357.0355650134143 1.8692e-05 deg
peri 53.8375031685197 2.341e-05 deg
i 13.21922054697563 4.5768e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1106  
   data-arc span      9568 days (26.20 yr)  
   first obs. used      1993-04-18  
   last obs. used      2019-06-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4718  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 22:32:20  

Additional Information
 Jupiter MOID = 2.447 au 
 T_jup = 3.334 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.285376391113586E-15 -3.355619120281355E-15 2.004893175328342E-13 -7.769520579782785E-15 1.844084291898262E-14 -1.652114674527403E-15
q -3.355619120281355E-15 8.890979149469793E-15 -3.678361659884385E-13 2.167194651897264E-14 -2.976015497463786E-14 4.53293604523397E-15
tp 2.004893175328342E-13 -3.678361659884385E-13 4.043214515202238E-9 2.629406761001589E-12 9.107153293206941E-10 -1.125533757808219E-11
node -7.769520579782785E-15 2.167194651897264E-14 2.629406761001589E-12 3.493983045882701E-10 -3.388716908144639E-10 -8.623259582645254E-12
peri 1.844084291898262E-14 -2.976015497463786E-14 9.107153293206941E-10 -3.388716908144639E-10 5.480255144062683E-10 5.917469224469009E-12
i -1.652114674527403E-15 4.53293604523397E-15 -1.125533757808219E-11 -8.623259582645254E-12 5.917469224469009E-12 2.094691294558117E-11

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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