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268 Adorea (A887 LA)
Classification: Main-belt Asteroid          SPK-ID: 2000268
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 57 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1371015011714398 3.5991e-08  
a 3.091198404920202 1.1353e-08 au
q 2.667390463186882 1.1217e-07 au
i 2.440437251629287 3.8223e-06 deg
node 120.8568854289995 9.3726e-05 deg
peri 68.72271429603084 9.4705e-05 deg
M 196.9130076035414 1.4875e-05 deg
tp 2459899.802023732649
(2022-Nov-16.30202373)
8.3801e-05 TDB
period 1985.129063860177
5.43
1.0936e-05
2.994e-08
d
yr
n .1813484103144221 9.9902e-10 deg/d
Q 3.515006346653522 1.2909e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3356  
   data-arc span      45613 days (124.88 yr)  
   first obs. used      1895-12-11  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45967  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:31:30  

Additional Information
 Earth MOID = 1.66921 au 
 Jupiter MOID = 1.44175 au 
 T_jup = 3.209 
[ 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 8.4   n/a MPO502155 IRAS observations used: 3
diameter diameter 144.585 km 0.892 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 7.80 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Stephens, R.D. (2006) Minor Planet Bull. 33, 100-101.]
geometric albedo albedo 0.041   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.663   0.039 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=3.02, mean=8.19, max.=16.88) deg.
U-B UB 0.285   0.026 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=3.02, mean=8.19, max.=16.88) deg.
Tholen spectral type spec_T FC   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

268 Adorea (A887 LA)          Discovered 1887-Jun-08 by Borrelly, A. at Marseille
June 9 is date of first measurement.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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