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30947 (1994 JW)
Classification: Main-belt Asteroid          SPK-ID: 2030947
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1395608695463068 1.5961e-08  
a 2.685696414395441 1.1173e-08 au
q 2.310878287465015 4.2275e-08 au
i 13.59794637092655 4.0632e-07 deg
node 65.39112885444479 1.9065e-06 deg
peri 30.56307075995788 9.8342e-06 deg
M 159.4162823246038 8.4355e-06 deg
tp 2458684.608213841831
(2019-Jul-20.10821384)
3.5824e-05 TDB
period 1607.621500638816
4.40
1.0032e-05
2.747e-08
d
yr
n .223933307595692 1.3974e-09 deg/d
Q 3.060514541325867 1.2733e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1941  
   data-arc span      9910 days (27.13 yr)  
   first obs. used      1994-05-04  
   last obs. used      2021-06-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44514  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 19:50:27  

Additional Information
 Earth MOID = 1.33702 au 
 Jupiter MOID = 2.2121 au 
 T_jup = 3.320 
[ 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 13.57   n/a MPCxxxxx  
diameter diameter 5.997 km 0.337 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 17.0185 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.]
geometric albedo albedo 0.235   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

30947 (1994 JW)          Discovered 1994-May-04 by Helin, E. F. at Palomar
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1994 JW = 1998 GT1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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