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86 Semele (A866 AA)
Classification: Main-belt Asteroid          SPK-ID: 2000086
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 99 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2151374597539971 3.7793e-08  
a 3.107374383285734 9.1307e-09 au
q 2.438861751960998 1.18e-07 au
i 4.820528131678785 3.5146e-06 deg
node 86.09722831414874 4.9839e-05 deg
peri 308.9030578440489 5.0378e-05 deg
M 63.86235799474301 8.7854e-06 deg
tp 2458645.579366657207
(2019-Jun-11.07936666)
4.7924e-05 TDB
period 2000.731448311435
5.48
8.8184e-06
2.414e-08
d
yr
n .1799341937189174 7.9307e-10 deg/d
Q 3.775887014610471 1.1095e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3100  
   data-arc span      54357 days (148.82 yr)  
   first obs. used      1871-12-29  
   last obs. used      2020-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45954  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:33:33  

Additional Information
 Earth MOID = 1.4494 au 
 Jupiter MOID = 1.66714 au 
 T_jup = 3.179 
[ 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 8.7   n/a MPO502153 IRAS observations used: 11
diameter diameter 109.929 km 0.609 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 16.634 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Surdej, J.; Surdej, A.; Louis, B. (1983) Astron. Astrophys. Suppl. Ser. 52, 203-211.]
geometric albedo albedo 0.056   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.703   0.021 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=6; phase (min.=3.71, mean=9.31, max.=17.22) deg.
U-B UB 0.321   0.022 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=3.71, mean=7.73, max.=13.25) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

86 Semele (A866 AA)          Discovered 1866-Jan-04 by Tietjen, F. at Berlin
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A866 AA = 1978 BB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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