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52868 (1998 SJ25)
Classification: Main-belt Asteroid          SPK-ID: 2052868
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09667488939247314 2.8071e-08  
a 2.24950365782418 6.4203e-09 au
q 2.032033140516063 6.2725e-08 au
i 5.672773734912414 3.118e-06 deg
node 109.2816881189948 3.8317e-05 deg
peri 4.459958928592727 4.3716e-05 deg
M 125.8917210456054 2.0694e-05 deg
tp 2458769.553703892872
(2019-Oct-13.05370389)
7.0554e-05 TDB
period 1232.334146439742
3.37
5.2758e-06
1.444e-08
d
yr
n .2921285602935317 1.2506e-09 deg/d
Q 2.466974175132296 7.041e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1680  
   data-arc span      7917 days (21.68 yr)  
   first obs. used      1998-09-22  
   last obs. used      2020-05-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48605  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 10:48:43  

Additional Information
 Earth MOID = 1.04849 au 
 Jupiter MOID = 2.60206 au 
 T_jup = 3.616 
[ 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 15.07   n/a E2021B10  
diameter diameter 2.509 km 0.587 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.46152 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 0.370   0.227 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

52868 (1998 SJ25)          Discovered 1998-Sep-22 by LONEOS at Anderson Mesa
Reference: 20030216/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 SJ25 = 2000 EK55 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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