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187804 (1999 OB2)
Classification: Main-belt Asteroid          SPK-ID: 2187804
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2607932905888433 4.7332e-08  
a 2.869439116108456 2.0265e-08 au
q 2.12110864687419 1.3551e-07 au
i 14.17267388339986 5.5965e-06 deg
node 236.0844780529804 1.8881e-05 deg
peri 79.32293205244699 2.2883e-05 deg
M 165.8027422869262 1.8333e-05 deg
tp 2458382.820411309227
(2018-Sep-21.32041131)
8.4734e-05 TDB
period 1775.390731591594
4.86
1.8808e-05
5.149e-08
d
yr
n .2027722650536025 2.1481e-09 deg/d
Q 3.617769585342723 2.555e-08 au
  Orbit Determination Parameters
   # obs. used (total)      749  
   data-arc span      7880 days (21.57 yr)  
   first obs. used      1999-07-22  
   last obs. used      2021-02-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51167  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:56:54  

Additional Information
 Earth MOID = 1.16004 au 
 Jupiter MOID = 1.91604 au 
 T_jup = 3.204 
[ 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 14.58   n/a E2021B55  
diameter diameter 7.210 km 0.164 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.054   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

187804 (1999 OB2)          Discovered 1999-Jul-22 by LINEAR at Socorro
Reference: 20080618/Numbers.arcLast Updated: 2008-06-20

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