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30923 (1993 QU4)
Classification: Main-belt Asteroid          SPK-ID: 2030923
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .110138182900303 3.9082e-08  
a 2.548758562416028 1.1587e-08 au
q 2.268042925699938 9.7617e-08 au
i 11.13420085074929 4.0852e-06 deg
node 159.4245279814101 1.9761e-05 deg
peri 153.5118928702535 2.9908e-05 deg
M 280.585138215054 2.6764e-05 deg
tp 2459528.361753399848
(2021-Nov-09.86175340)
0.00011194 TDB
period 1486.248651336434
4.07
1.0135e-05
2.775e-08
d
yr
n .2422205730355336 1.6518e-09 deg/d
Q 2.829474199132118 1.2863e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1460  
   data-arc span      11447 days (31.34 yr)  
   first obs. used      1989-09-02  
   last obs. used      2021-01-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50775  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 06:42:18  

Additional Information
 Earth MOID = 1.25838 au 
 Jupiter MOID = 2.4866 au 
 T_jup = 3.407 
[ 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 14.32   n/a E2021B10  
rotation period rot_per 9.31612 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.]

30923 (1993 QU4)          Discovered 1993-Aug-18 by Elst, E. W. at Caussols
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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