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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08542188705220162 3.0244e-08  
a 2.997978926389773 1.2336e-08 au
q 2.741885909154825 8.8717e-08 au
i 15.1638605643414 4.1835e-06 deg
node 197.8244343519872 1.2788e-05 deg
peri 252.6539928379639 2.7997e-05 deg
M 252.3904280883096 2.5919e-05 deg
tp 2459963.247604868703
(2023-Jan-18.74760487)
0.00013751 TDB
period 1896.012911566725
5.19
1.1702e-05
3.204e-08
d
yr
n .1898721247117049 1.1719e-09 deg/d
Q 3.254071943624721 1.339e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3147  
   data-arc span      39330 days (107.68 yr)  
   first obs. used      1913-10-31  
   last obs. used      2021-07-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42723  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 09:22:19  

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 10.45   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

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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