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52945 (1998 SQ142)
Classification: Main-belt Asteroid          SPK-ID: 2052945
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .142164619594789 2.7624e-08  
a 2.241512881784218 7.0514e-09 au
q 1.922849055628546 6.0937e-08 au
i 3.941957741277508 3.1713e-06 deg
node 118.5067339956352 6.223e-05 deg
peri 2.877677130771428 6.4375e-05 deg
M 137.8420436395627 1.6905e-05 deg
tp 2458731.157926124946
(2019-Sep-04.65792612)
5.6761e-05 TDB
period 1225.773661894001
3.36
5.7841e-06
1.584e-08
d
yr
n .2936920666444626 1.3859e-09 deg/d
Q 2.560176707939891 8.0539e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1158  
   data-arc span      7950 days (21.77 yr)  
   first obs. used      1998-09-18  
   last obs. used      2020-06-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53306  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 10:49:11  

Additional Information
 Earth MOID = .938633 au 
 Jupiter MOID = 2.50355 au 
 T_jup = 3.618 
[ 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 15.60   n/a E2021B10  
diameter diameter 1.890 km 0.279 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.47969 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.411   0.116 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

52945 (1998 SQ142)          Discovered 1998-Sep-26 by LINEAR at Socorro
Reference: 20030216/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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