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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05640950634754997 4.9965e-08  
a 2.706378392165379 1.5968e-08 au
q 2.553712923073654 1.409e-07 au
i 6.917078370613734 4.5142e-06 deg
node 127.114176219063 3.8668e-05 deg
peri 220.4604696509557 5.3901e-05 deg
M 300.4782746812157 4.0395e-05 deg
tp 2459665.377346490885
(2022-Mar-26.87734649)
0.00018313 TDB
period 1626.227133341697
4.45
1.4392e-05
3.94e-08
d
yr
n .2213712910202428 1.9591e-09 deg/d
Q 2.859043861257105 1.6868e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1045  
   data-arc span      8940 days (24.48 yr)  
   first obs. used      1997-01-14  
   last obs. used      2021-07-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54137  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 18:17:08  

Additional Information
 Earth MOID = 1.5491 au 
 Jupiter MOID = 2.39628 au 
 T_jup = 3.352 
[ 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 14.93   n/a MPCxxxxx  
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. 2020-October); 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

Alternate Designations
 1998 HQ142 = 2000 WY32 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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