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904 Rockefellia (A918 UC)
Classification: Main-belt Asteroid          SPK-ID: 2000904
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 48 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08542188396204556 2.9191e-08  
a 2.997978924988952 1.1826e-08 au
q 2.741885917137888 8.6314e-08 au
i 15.1638608731096 4.1079e-06 deg
node 197.824435211617 1.257e-05 deg
peri 252.65399251309 2.7826e-05 deg
M 252.3904281332582 2.5914e-05 deg
tp 2459963.247604234748
(2023-Jan-18.74760423)
0.00013749 TDB
period 1896.012910237843
5.19
1.1219e-05
3.072e-08
d
yr
n .189872124844783 1.1235e-09 deg/d
Q 3.254071932840016 1.2836e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3227  
   data-arc span      39364 days (107.77 yr)  
   first obs. used      1913-10-31  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42248  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 07:07:44  

Additional Information
 Earth MOID = 1.80176 au 
 Jupiter MOID = 2.0184 au 
 T_jup = 3.196 
[ 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 10.46   n/a MPO636074  
diameter diameter 49.146 km 0.763 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 6.826 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:
[Polakis, T. (2018) Minor Planet Bull. 45, 199-203.]
[Polakis, T. (2020) Minor Planet Bull. 47, 314-321.]
geometric albedo albedo 0.055   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

904 Rockefellia (A918 UC)          Discovered 1918-Oct-29 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A918 UC = 1949 UK = 1961 AK = A913 UD = A916 KC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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