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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 ]

[ show orbit diagram ]
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456187.5 (2012-Sep-17.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09006513715524619 3.1478e-08  
q 2.724251315433762 9.3089e-08 au
tp 2456170.898405679371
(2012-Aug-31.39840568)
0.00012352 TDB
node 198.1759049285297 1.2926e-05 deg
peri 251.1640768853039 2.6761e-05 deg
i 15.16282320432672 4.2589e-06 deg
  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
 Jupiter MOID = 2.02088 au 
 T_jup = 3.195 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.908612913654459E-16 -2.910989606491848E-15 -5.18197176140577E-13 -2.447175466341983E-15 -9.964808961548239E-14 -2.95820198274936E-16
q -2.910989606491848E-15 8.665483668129208E-15 1.843558861026241E-12 6.289029908380362E-15 3.525102187106656E-13 8.278511172904266E-16
tp -5.18197176140577E-13 1.843558861026241E-12 1.525655988534986E-8 1.113081194381547E-11 2.905833225405358E-9 2.10682961510329E-13
node -2.447175466341983E-15 6.289029908380362E-15 1.113081194381547E-11 1.670931178509249E-10 -1.589622392369586E-10 1.901284012136812E-12
peri -9.964808961548239E-14 3.525102187106656E-13 2.905833225405358E-9 -1.589622392369586E-10 7.161404447496681E-10 -1.758979772536976E-12
i -2.95820198274936E-16 8.278511172904266E-16 2.10682961510329E-13 1.901284012136812E-12 -1.758979772536976E-12 1.813842951078252E-11

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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2066-May-02 02:23 < 00:01 Europ 0.0381391102050996 0.0381373804595601 0.0381408406123549 4.10001034197695 4.10001027400711 2475772.599399976 0.725192440043092 278.452151502249 28.0582910508141 72.8853645335062 194307.712863031 T 44 CATAB v2.0f-lin.ifort 2021-Apr-12 11:37:04 2021-Apr-12 11:37
2086-Jan-23 21:58 00:01 Eunom 0.0400299399777592 0.0400253311986138 0.0400345497058101 6.22222075608011 6.22222069972108 2482979.415093140 1.42759151524556 385.055629063169 24.8075273166559 -53.5301056239574 194254.166303043 T 44 CATAB v2.0f-lin.ifort 2021-Apr-12 11:37:04 2021-Apr-12 11:37

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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