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22657 (1998 QN8)
Classification: Main-belt Asteroid          SPK-ID: 2022657
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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1064773019370802 3.3211e-08  
a 2.671609060415502 9.1313e-09 au
q 2.387143335831801 9.076e-08 au
i 3.464041831016301 3.4715e-06 deg
node 314.9026110052041 4.939e-05 deg
peri 9.235783081039305 5.1414e-05 deg
M 32.25328199906809 1.3403e-05 deg
tp 2459057.600996152504
(2020-Jul-27.10099615)
5.953e-05 TDB
period 1594.989352915619
4.37
8.1773e-06
2.239e-08
d
yr
n .2257068358117406 1.1572e-09 deg/d
Q 2.956074784999203 1.0104e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2228  
   data-arc span      9633 days (26.37 yr)  
   first obs. used      1994-09-27  
   last obs. used      2021-02-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45475  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:08:48  

Additional Information
 Earth MOID = 1.37298 au 
 Jupiter MOID = 2.32297 au 
 T_jup = 3.370 
[ 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 13.93   n/a E2021B10  
diameter diameter 6.007 km 0.210 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.179 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.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.162   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

22657 (1998 QN8)          Discovered 1998-Aug-17 by LINEAR at Socorro
Reference: 20010309/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 QN8 = 1999 XC168 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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