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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 82 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2186165453999945 3.5821e-08  
a 2.765514639093761 5.6199e-09 AU
q 2.16092738244197 9.8644e-08 AU
i 2.828679468838394 3.1724e-06 deg
node 25.50705284856452 8.7816e-05 deg
peri 111.2775882378032 8.8351e-05 deg
M 192.5631081171332 8.4757e-06 deg
tp 2457781.787763254116
(2017-Jan-28.28776325)
4.0659e-05 JED
period 1679.818537053616
4.60
5.1204e-06
1.402e-08
d
yr
n .2143088625700227 6.5326e-10 deg/d
Q 3.370101895745551 6.8485e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      1730  
   data-arc span      54742 days (149.88 yr)  
   first obs. used      1864-12-05  
   last obs. used      2014-10-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .61012  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Nov-10 12:40:50  

Additional Information
 Earth MOID = 1.17691 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 Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) 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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