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JPL Small-Body Database Browser
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91231 (1999 BP24)
Classification: Main-belt Asteroid          SPK-ID: 2091231
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ 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 .0300109801266552 4.0938e-08  
a 2.128857987400453 8.497e-09 au
q 2.064968872648107 9.1526e-08 au
i 2.211497708948594 4.2166e-06 deg
node 251.0894680952199 0.00012756 deg
peri 186.0648107754504 0.00016962 deg
M 355.6661985340554 0.00011351 deg
tp 2459014.157932916098
(2020-Jun-13.65793292)
0.00035778 TDB
period 1134.53647760112
3.11
6.7925e-06
1.86e-08
d
yr
n .3173102029836794 1.8997e-09 deg/d
Q 2.192747102152799 8.752e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1510  
   data-arc span      14120 days (38.66 yr)  
   first obs. used      1981-05-08  
   last obs. used      2020-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50086  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 14:01:08  

Additional Information
 Earth MOID = 1.07992 au 
 Jupiter MOID = 2.85331 au 
 T_jup = 3.722 
[ 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 15.0   n/a MPO395812  
diameter diameter 2.576 km 0.485 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 79.346 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.351   0.092 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91231 (1999 BP24)          Discovered 1999-Jan-18 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

Alternate Designations
 1999 BP24 = 1981 JT4 = 1990 GT = 1995 WX31 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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