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236 Honoria
Classification: Main-belt Asteroid          SPK-ID: 2000236
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1897703892253353 3.9217e-08  
a 2.798836627875005 9.1157e-09 AU
q 2.26770031162504 1.0963e-07 AU
i 7.691617492580418 5.0736e-06 deg
node 185.8618926109968 3.8819e-05 deg
peri 174.9169382943506 4.0977e-05 deg
M 168.1129204023487 1.324e-05 deg
tp 2456201.837410448339
(2012-Oct-01.33741045)
6.2081e-05 JED
period 1710.270284701931
4.68
8.3554e-06
2.288e-08
d
yr
n .2104930450000431 1.0283e-09 deg/d
Q 3.329972944124969 1.0846e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1332  
   data-arc span      47720 days (130.65 yr)  
   first obs. used      1884-04-28  
   last obs. used      2014-12-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58352  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-07 23:43:58  

Additional Information
 Earth MOID = 1.26505 AU 
 T_jup = 3.286 
[ 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 8.18 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 21
magnitude slope G -0.02   n/a PDS3 (MPC 17258) Fit
diameter diameter 86.20 km 3.7 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 21
rotation period rot_per 12.333 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Lagerkvist, C.-I.; Hahn, G.; Magnusson, P.; Rickman, H. (1987) Astron. Astrophys. Suppl. Ser. 70, 21-32.]
[Harris, A.W.; Young, J.W. (1989) Icarus 81, 314-364.]
geometric albedo albedo 0.1271   0.012 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 21
B-V BV .852 mag .016 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=5; phase (min.=6.27, mean=12.05, max.=20.17) deg.
U-B UB .444 mag .024 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=6; phase (min.=5.06, mean=10.88, max.=20.17) 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 L   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)

236 Honoria          Discovered 1884-Apr-26 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1930 KK = 1953 GJ1 = A904 PA 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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