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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 ]

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Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 94 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .218623842639836 3.4824e-08  
a 2.764340994797359 5.5352e-09 au
q 2.159990144147933 9.5998e-08 au
i 2.82902270106458 3.1146e-06 deg
node 25.5015581422468 8.2189e-05 deg
peri 111.4018892138121 8.2653e-05 deg
M 321.0431804815306 8.5767e-06 deg
tp 2457782.163150180637
(2017-Jan-28.66315018)
4.0278e-05 JED
period 1678.749314584675
4.60
5.0422e-06
1.38e-08
d
yr
n .2144453593353005 6.441e-10 deg/d
Q 3.368691845446784 6.7453e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2047  
   data-arc span      55224 days (151.20 yr)  
   first obs. used      1864-12-05  
   last obs. used      2016-02-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58509  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Mar-24 15:22:16  

Additional Information
 Earth MOID = 1.17434 au 
 Jupiter MOID = 1.67894 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. 2016-February); 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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