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78212 (2002 OB1)
Classification: Main-belt Asteroid          SPK-ID: 2078212
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07530852577498459 4.284e-08  
a 3.028638419095989 1.8192e-08 au
q 2.80055612464839 1.2811e-07 au
i 9.733071815903488 3.8083e-06 deg
node 226.1611534251789 2.7252e-05 deg
peri 145.5491269557498 3.8873e-05 deg
M 154.3622693080615 2.7858e-05 deg
tp 2458571.016833401551
(2019-Mar-28.51683340)
0.00014736 TDB
period 1925.172137644401
5.27
1.7345e-05
4.749e-08
d
yr
n .1869962654043437 1.6848e-09 deg/d
Q 3.256720713543588 1.9562e-08 au
  Orbit Determination Parameters
   # obs. used (total)      945  
   data-arc span      9145 days (25.04 yr)  
   first obs. used      1996-04-25  
   last obs. used      2021-05-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52496  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 23:05:29  

Additional Information
 Earth MOID = 1.80743 au 
 Jupiter MOID = 2.15486 au 
 T_jup = 3.218 
[ 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 14.73   n/a E2021B10  
diameter diameter 4.333 km 1.100 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.746 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.136   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

78212 (2002 OB1)          Discovered 2002-Jul-17 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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