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103 Hera
Classification: Main-belt Asteroid          SPK-ID: 2000103
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 82 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08137834359578371 2.9832e-08  
a 2.702153578924938 7.8913e-09 AU
q 2.482256796530608 8.1133e-08 AU
i 5.419260425447312 3.7744e-06 deg
node 136.1890394986085 3.9322e-05 deg
peri 188.6974814049138 4.4065e-05 deg
M 315.4583946926355 2.1053e-05 deg
tp 2457001.236725087056
(2014-Dec-09.73672509)
9.513e-05 JED
period 1622.420667882658
4.44
7.1071e-06
1.946e-08
d
yr
n .2218906644414352 9.7201e-10 deg/d
Q 2.922050361319269 8.5335e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      1424  
   data-arc span      52273 days (143.12 yr)  
   first obs. used      1871-04-04  
   last obs. used      2014-05-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .60579  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-16 13:09:01  

Additional Information
 Earth MOID = 1.46906 AU 
 T_jup = 3.356 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.66 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 25
diameter diameter 91.20 km 5.6 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 25
rotation period rot_per 23.740 h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) Published Reference List:
[Harris, A.W.; Young, J.W. (1983) Icarus 54, 59-109.]
[Pilcher, F.; Higgins, D. (2011) Minor Planet Bul. 38, 32.]
geometric albedo albedo 0.1833   0.025 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 25
B-V BV .853 mag .012 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=7; phase (min.=3.66, mean=7.54, max.=19.73) deg.
U-B UB .441 mag .015 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=8; phase (min.=3.66, mean=9.26, max.=21.25) 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 S   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)

103 Hera          Discovered 1868-Sep-07 by Watson, J. C. at Ann Arbor
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1927 CV = 1950 CM 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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