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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 | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0858830206611013 3.1304e-08  
a 2.998768923943455 1.198e-08 au
q 2.74122559049055 9.1837e-08 au
i 15.14600644699521 4.2549e-06 deg
node 197.9508147720144 1.2937e-05 deg
peri 252.0804858786847 2.7884e-05 deg
M 215.7281625096048 2.5618e-05 deg
tp 2459960.637208571704
(2023-Jan-16.13720857)
0.00013644 TDB
period 1896.762388598754
5.19
1.1366e-05
3.112e-08
d
yr
n .189797099607164 1.1373e-09 deg/d
Q 3.256312257396359 1.3008e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3045  
   data-arc span      39089 days (107.02 yr)  
   first obs. used      1913-10-31  
   last obs. used      2020-11-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43314  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 11:36:40  

Additional Information
 Earth MOID = 1.80023 au 
 Jupiter MOID = 2.02088 au 
 T_jup = 3.195 
[ 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 10.45   n/a E2021B10  
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

[ show close-approach data ]
Alternate Designations
 A918 UC = 1949 UK = 1961 AK = A913 UD = A916 KC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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