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46251 (2001 HO31)
Classification: Main-belt Asteroid          SPK-ID: 2046251
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05888757592039622 3.953e-08  
a 3.049331761144531 1.9622e-08 au
q 2.869764005553657 1.2401e-07 au
i 10.18587670708374 3.8973e-06 deg
node 129.9074470272303 2.4841e-05 deg
peri 279.4718550373569 4.4523e-05 deg
M 36.01628824691246 3.5375e-05 deg
tp 2458805.918343856613
(2019-Nov-18.41834386)
0.00019141 TDB
period 1944.93657234722
5.32
1.8773e-05
5.14e-08
d
yr
n .1850960103884205 1.7866e-09 deg/d
Q 3.228899516735404 2.0777e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1316  
   data-arc span      7716 days (21.13 yr)  
   first obs. used      1998-12-15  
   last obs. used      2020-01-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49705  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 08:24:21  

Additional Information
 Earth MOID = 1.90325 au 
 Jupiter MOID = 2.00961 au 
 T_jup = 3.211 
[ 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 13.8   n/a MPO459171  
diameter diameter 6.922 km 0.202 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 14.542 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.147   0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

46251 (2001 HO31)          Discovered 2001-Apr-26 by Yeung, W. K. Y. at Desert Beaver
Reference: 20020822/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 2001 HO31 = 1998 XS80 = 2000 EA81 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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