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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 64 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1369080453574194 1.9337e-08  
a 3.091930838350631 1.0743e-08 au
q 2.668620630891719 6.4428e-08 au
i 2.440432314246164 3.0307e-07 deg
node 120.8555858914574 1.0624e-05 deg
peri 68.64954605675486 1.3482e-05 deg
M 233.2582281572325 1.0595e-05 deg
tp 2459899.633893064802
(2022-Nov-16.13389306)
6.0304e-05 TDB
period 1985.834645073185
5.44
1.0349e-05
2.833e-08
d
yr
n .181283975930802 9.4478e-10 deg/d
Q 3.515241045809543 1.2213e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3696  
   data-arc span      45757 days (125.28 yr)  
   first obs. used      1895-12-11  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44564  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:08:33  

Additional Information
 Earth MOID = 1.66985 au 
 Jupiter MOID = 1.44045 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 8.42   n/a E2021B10 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. 2020-October); 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

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