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JPL Small-Body Database Browser
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295930 (2008 XQ4)
Classification: Main-belt Asteroid          SPK-ID: 2295930
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1661549277078785 5.2235e-08  
a 3.086428469042655 5.252e-08 au
q 2.573603169893335 1.6229e-07 au
i 5.03299723380399 8.9935e-06 deg
node 307.2795408480192 6.2322e-05 deg
peri 108.5584619077766 7.035e-05 deg
M 338.6588852265443 3.301e-05 deg
tp 2458717.907908579289
(2019-Aug-22.40790858)
0.00018328 TDB
period 1980.536046838385
5.42
5.0553e-05
1.384e-07
d
yr
n .1817689713725148 4.6396e-09 deg/d
Q 3.599253768191975 6.1247e-08 au
  Orbit Determination Parameters
   # obs. used (total)      325  
   data-arc span      5821 days (15.94 yr)  
   first obs. used      2002-10-04  
   last obs. used      2018-09-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57756  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-04 10:42:08  

Additional Information
 Earth MOID = 1.59066 au 
 Jupiter MOID = 1.78223 au 
 T_jup = 3.199 
[ 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 15.6   n/a MPO455188  
diameter diameter 4.446 km 1.404 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 6.19 h n/a LCDB (Rev. 2019-January); 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.; Lin, H.-W.; Ip, W.-H.; Prince, T.A.; et al. (2016) Astrophys. J. Sup. Ser. 227, A20.]
geometric albedo albedo 0.068   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

295930 (2008 XQ4)          Discovered 2008-Dec-03 by LINEAR at Socorro
Reference: 20110912/Numbers.arcLast Updated: 2011-09-14

[ show close-approach data ]
Alternate Designations
 2008 XQ4 = 2004 BK48 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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