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66451 (1999 OS2)
Classification: Main-belt Asteroid          SPK-ID: 2066451
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1975240600850585 5.1174e-08  
a 2.555918325128353 9.7014e-09 au
q 2.051062960303198 1.3424e-07 au
i 12.12219005178605 5.2929e-06 deg
node 288.593940816583 1.6013e-05 deg
peri 55.92662641794401 2.0638e-05 deg
M 94.71276867593916 1.2206e-05 deg
tp 2458807.832537476662
(2019-Nov-20.33253748)
4.9526e-05 TDB
period 1492.515618375252
4.09
8.4977e-06
2.327e-08
d
yr
n .2412035060590487 1.3733e-09 deg/d
Q 3.060773689953508 1.1618e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1411  
   data-arc span      24234 days (66.35 yr)  
   first obs. used      1954-10-04  
   last obs. used      2021-02-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46413  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 12:22:19  

Additional Information
 Earth MOID = 1.06705 au 
 Jupiter MOID = 2.39948 au 
 T_jup = 3.379 
[ 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 14.54   n/a MPCxxxxx  
diameter diameter 3.847 km 0.805 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.345612 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.227   0.095 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

66451 (1999 OS2)          Discovered 1999-Jul-22 by LINEAR at Socorro
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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