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

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 71 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .209671323112667 4.4554e-08  
a 3.114878648973419 1.299e-08 AU
q 2.461777921307765 1.3815e-07 AU
i 4.820207327551612 4.0185e-06 deg
node 86.40543710655379 6.1843e-05 deg
peri 308.6941765907112 6.2326e-05 deg
M 64.3664923266135 9.274e-06 deg
tp 2456641.480972117439
(2013-Dec-14.98097212)
5.0742e-05 JED
period 2007.98342997918
5.50
1.256e-05
3.439e-08
d
yr
n .1792843479807663 1.1215e-09 deg/d
Q 3.767979376639072 1.5713e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1400  
   data-arc span      52203 days (142.92 yr)  
   first obs. used      1871-12-29  
   last obs. used      2014-12-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .59861  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-07 23:42:54  

Additional Information
 Earth MOID = 1.47204 AU 
 T_jup = 3.178 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.54 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 11
diameter diameter 120.56 km 3.3 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 11
rotation period rot_per 16.634 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Published Reference List:
[Surdej, J.; Surdej, A.; Louis, B. (1983) Astron. Astrophys. Suppl. Ser. 52, 203-211.]
geometric albedo albedo 0.0466   0.003 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 11
B-V BV .703 mag .021 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=6; phase (min.=3.71, mean=9.31, max.=17.22) deg.
U-B UB .321 mag .022 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #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          Discovered 1866-Jan-04 by Tietjen, F. at Berlin
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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