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30945 (1994 GW9)
Classification: Main-belt Asteroid          SPK-ID: 2030945
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08431186617414974 4.2366e-08  
a 3.064850777563223 1.7592e-08 au
q 2.806447488961574 1.326e-07 au
i 10.15792627902137 5.2712e-06 deg
node 33.31403726208973 2.342e-05 deg
peri 280.8465870157085 3.8372e-05 deg
M 260.2389107388002 3.1796e-05 deg
tp 2459743.589129450938
(2022-Jun-13.08912945)
0.00017375 TDB
period 1959.803045959507
5.37
1.6874e-05
4.62e-08
d
yr
n .1836919279935839 1.5816e-09 deg/d
Q 3.323254066164873 1.9075e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1630  
   data-arc span      14302 days (39.16 yr)  
   first obs. used      1982-01-26  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50142  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 04:32:45  

Additional Information
 Earth MOID = 1.81462 au 
 Jupiter MOID = 1.94641 au 
 T_jup = 3.203 
[ 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 13.44   n/a E2021B10  
diameter diameter 7.944 km 0.288 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.38 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:
[Erasmus, N.; McNeill, A.; Mommert, N.; Trilling, D.E.; et al. (2019) Ap. J. Suppl. Series 242, A15.]
geometric albedo albedo 0.147   0.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

30945 (1994 GW9)          Discovered 1994-Apr-14 by Gilmore, A. C., Kilmartin, P. M. at Lake Tekapo
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1994 GW9 = 1982 BM5 = 1999 GV40 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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