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135691 (2002 OS20)
Classification: Main-belt Asteroid          SPK-ID: 2135691
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2696522976674564 9.3635e-08  
a 2.446467788918054 2.165e-08 au
q 1.786772128466879 2.1562e-07 au
i 7.098031590225444 4.4756e-06 deg
node 324.6828850851162 4.1152e-05 deg
peri 70.28581241198221 4.2739e-05 deg
M 234.4719907590799 1.814e-05 deg
tp 2459687.855442700184
(2022-Apr-18.35544270)
7.6419e-05 TDB
period 1397.679772291594
3.83
1.8553e-05
5.08e-08
d
yr
n .257569728872698 3.4191e-09 deg/d
Q 3.106163449369229 2.7488e-08 au
  Orbit Determination Parameters
   # obs. used (total)      531  
   data-arc span      11881 days (32.53 yr)  
   first obs. used      1987-11-15  
   last obs. used      2020-05-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50059  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 18:14:10  

Additional Information
 Earth MOID = .80679 au 
 Jupiter MOID = 2.39966 au 
 T_jup = 3.437 
[ 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 16.06   n/a MPCxxxxx  
diameter diameter 3.430 km 0.048 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.867 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.053   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

135691 (2002 OS20)          Discovered 2002-Jul-22 by NEAT at Palomar
Reference: 20060907/Numbers.arcLast Updated: 2006-09-10

[ show close-approach data ]
Alternate Designations
 2002 OS20 = 1987 VA2 = 2000 ET205 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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