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JPL Small-Body Database Browser
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236 Honoria (A884 HA)
Classification: Main-belt Asteroid          SPK-ID: 2000236
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1910885751030109 3.7514e-08  
a 2.796956205412692 8.1972e-09 au
q 2.262489829494857 1.0556e-07 au
i 7.69570332296731 4.3794e-06 deg
node 185.8479577324561 3.1079e-05 deg
peri 174.64048093 3.3085e-05 deg
M 229.6438914399343 1.3236e-05 deg
tp 2459619.165378322013
(2022-Feb-08.66537832)
6.4022e-05 TDB
period 1708.54698453429
4.68
7.511e-06
2.056e-08
d
yr
n .2107053556376897 9.2629e-10 deg/d
Q 3.331422581330528 9.7636e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2755  
   data-arc span      49672 days (135.99 yr)  
   first obs. used      1884-04-28  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46532  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:01:43  

Additional Information
 Earth MOID = 1.25965 au 
 Jupiter MOID = 2.12983 au 
 T_jup = 3.287 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.1   n/a MPO473763 IRAS observations used: 21
magnitude slope G -0.02   n/a PDS3 (MPC 17258) Fit
diameter diameter 77.708 km 1.234 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 12.336 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 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.]
[Marciniak, A.; Pilcher, F.; Santana-Ros, T.; Oszkiewicz; Kankiewicz, P. (2014) ACM 2014, Poster 57.]
[Pilcher, F. (2014) Minor Planet Bull. 41, 155-156.]
[Devogele, M.; Tanga, P.; Bendjoya, P.; Rivet, J.P.; et al. (2017) ArXiv:1707.07503.]
geometric albedo albedo 0.156   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.852   0.016 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=6.27, mean=12.05, max.=20.17) deg.
U-B UB 0.444   0.024 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #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 (A884 HA)          Discovered 1884-Apr-26 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A884 HA = 1930 KK = 1953 GJ1 = A904 PA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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