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37976 (1998 HC118)
Classification: Main-belt Asteroid          SPK-ID: 2037976
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04310797340372226 3.2735e-08  
a 2.597301979370556 1.2822e-08 au
q 2.485337554722415 8.8966e-08 au
i 10.33280246572977 3.4298e-06 deg
node 137.5974272517478 2.4095e-05 deg
peri 171.1815272848407 5.7058e-05 deg
M 10.47202443798206 5.2821e-05 deg
tp 2458956.025585140565
(2020-Apr-16.52558514)
0.00022429 TDB
period 1528.910617447115
4.19
1.1321e-05
3.1e-08
d
yr
n .2354617698980381 1.7435e-09 deg/d
Q 2.709266404018697 1.3374e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1635  
   data-arc span      7790 days (21.33 yr)  
   first obs. used      1998-04-23  
   last obs. used      2019-08-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47719  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 04:41:39  

Additional Information
 Earth MOID = 1.47144 au 
 Jupiter MOID = 2.44791 au 
 T_jup = 3.392 
[ 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 13.9   n/a MPO474235  
diameter diameter 4.477 km 0.142 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 13.703 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 0.320   0.051 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

37976 (1998 HC118)          Discovered 1998-Apr-23 by LINEAR at Socorro
Reference: 20020328/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HC118 = 1999 RD151 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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