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66187 (1998 XS73)
Classification: Outer Main-belt Asteroid          SPK-ID: 2066187
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1614997065611681 4.3924e-08  
a 3.984436881936064 4.0892e-08 au
q 3.340951494691895 1.7287e-07 au
i 7.672403397965678 5.4181e-06 deg
node 307.7025942291679 3.4207e-05 deg
peri 172.1975627566081 3.8232e-05 deg
M 278.3864102766444 1.979e-05 deg
tp 2460055.080448909743
(2023-Apr-20.58044891)
0.00016701 TDB
period 2905.01817664392
7.95
4.4721e-05
1.224e-07
d
yr
n .1239234931107719 1.9077e-09 deg/d
Q 4.627922269180234 4.7496e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1661  
   data-arc span      11014 days (30.15 yr)  
   first obs. used      1990-12-09  
   last obs. used      2021-02-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45775  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 12:20:06  

Additional Information
 Earth MOID = 2.35761 au 
 Jupiter MOID = .474188 au 
 T_jup = 3.018 
[ 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 12.18   n/a E2021B10  
diameter diameter 21.658 km 0.725 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
rotation period rot_per 31.034 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.065   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  

66187 (1998 XS73)          Discovered 1998-Dec-14 by LINEAR at Socorro
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 XS73 = 1996 SM8 = 1999 BW16 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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