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82 Alkmene
Classification: Main-belt Asteroid          SPK-ID: 2000082
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 92 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .218671097542936 3.5064e-08  
a 2.764830606087227 5.5715e-09 au
q 2.160242062933833 9.6632e-08 au
i 2.829010080975041 3.1155e-06 deg
node 25.50162318824975 8.346e-05 deg
peri 111.360311272163 8.3926e-05 deg
M 278.2020608021259 8.5111e-06 deg
tp 2457782.040883422153
(2017-Jan-28.54088342)
4.0284e-05 JED
period 1679.195336446141
4.60
5.0757e-06
1.39e-08
d
yr
n .2143883991256825 6.4803e-10 deg/d
Q 3.369419149240622 6.7898e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1988  
   data-arc span      55167 days (151.04 yr)  
   first obs. used      1864-12-05  
   last obs. used      2015-12-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58888  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 12:30:57  

Additional Information
 Earth MOID = 1.17595 au 
 Jupiter MOID = 1.67908 au 
 T_jup = 3.303 
[ 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 8.40 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 12
magnitude slope G 0.28   n/a PDS3 (MPC 17257) Fit
diameter diameter 60.96 km 1.5 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 12
rotation period rot_per 12.999 h n/a LCDB (Rev. 2015-December); Warner et al., 2009 Published Reference List:
[Harris, A.W.; Young, J.; Scaltriti, F.; Zappala, V. (1984) Icarus 57, 251-258.]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J. (2006) IAU 2006, poster paper.]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Kaasalainen, M.; Warner, B.D.; Fauerbach, M.; et al. (2009) Astron. Astrophys. 493, 291-297.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
geometric albedo albedo 0.2075   0.011 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 12
B-V BV .814 mag .014 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=5; phase (min.=8.57, mean=15.80, max.=23.77) deg.
U-B UB .380 mag .029 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=5; phase (min.=8.57, mean=15.80, max.=23.77) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B Sq   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

82 Alkmene          Discovered 1864-Nov-27 by Luther, R. at Dusseldorf
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1952 BB = 1963 OA = 1973 GO 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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