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30491 (2000 QJ38)
Classification: Main-belt Asteroid          SPK-ID: 2030491
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1650043139291429 2.8497e-08  
a 3.183511810774256 1.497e-08 au
q 2.658218628552127 9.0448e-08 au
i 2.173558977449132 4.0996e-06 deg
node 133.0209094604656 9.8771e-05 deg
peri 315.7359600869828 9.9716e-05 deg
M 101.3163956314635 1.3464e-05 deg
tp 2458616.604194493903
(2019-May-13.10419449)
7.6625e-05 TDB
period 2074.713462437042
5.68
1.4634e-05
4.007e-08
d
yr
n .1735179370635256 1.2239e-09 deg/d
Q 3.708804992996385 1.744e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1596  
   data-arc span      8867 days (24.28 yr)  
   first obs. used      1996-12-04  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50513  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 06:36:18  

Additional Information
 Earth MOID = 1.67495 au 
 Jupiter MOID = 1.50504 au 
 T_jup = 3.176 
[ 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 14.03   n/a MPCxxxxx  
diameter diameter 8.711 km 0.374 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.60 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.]
geometric albedo albedo 0.058   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

30491 (2000 QJ38)          Discovered 2000-Aug-24 by LINEAR at Socorro
Reference: 20011002/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 2000 QJ38 = 1998 HX75 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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