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91130 (1998 HQ142)
Classification: Main-belt Asteroid          SPK-ID: 2091130
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0561409461735501 5.1036e-08  
a 2.705595133109898 1.651e-08 au
q 2.553700462374557 1.4332e-07 au
i 6.917122962495413 4.643e-06 deg
node 127.1137716434567 3.947e-05 deg
peri 220.8127245984423 5.5017e-05 deg
M 212.4057111666383 4.1047e-05 deg
tp 2459666.937907992003
(2022-Mar-28.43790799)
0.00018706 TDB
period 1625.52120934703
4.45
1.4879e-05
4.074e-08
d
yr
n .2214674271427141 2.0272e-09 deg/d
Q 2.85748980384524 1.7437e-08 au
  Orbit Determination Parameters
   # obs. used (total)      994  
   data-arc span      8506 days (23.29 yr)  
   first obs. used      1997-01-14  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54564  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 16:37:58  

Additional Information
 Earth MOID = 1.55002 au 
 Jupiter MOID = 2.39959 au 
 T_jup = 3.353 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.9   n/a MPO385378  
diameter diameter 3.171 km 0.628 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 8.97 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:
[Chang, C.-K.; Lin, H.-W.; Ip, W.-H.; Prince, T.A.; et al. (2016) Astrophys. J. Sup. Ser. 227, A20.]
geometric albedo albedo 0.254   0.146 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91130 (1998 HQ142)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1998 HQ142 = 2000 WY32 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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