Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP

Significant website upgrade scheduled for September 27. More details available here.

JPL Small-Body Database Browser
Search: [ help ]  
904 Rockefellia (A918 UC)
Classification: Main-belt Asteroid          SPK-ID: 2000904
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ hide orbit diagram ]

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 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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456402.5 (2013-Apr-20.0) TDB
Reference: JPL 48 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08955443720799176 2.958e-08  
q 2.72422624408856 8.8406e-08 au
tp 2456170.481034894756
(2012-Aug-30.98103489)
0.00012373 TDB
node 198.1605745628189 1.2583e-05 deg
peri 251.0894933399859 2.6575e-05 deg
i 15.16310503857468 4.1093e-06 deg
  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
 Jupiter MOID = 2.0184 au 
 T_jup = 3.196 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.749843651683063E-16 -2.597917038585711E-15 -4.486671519006828E-13 -1.962257505982931E-15 -7.950979512967496E-14 -2.29171097555253E-16
q -2.597917038585711E-15 7.815631816800498E-15 1.631667922887038E-12 4.838628991107372E-15 2.943145386129578E-13 1.109534078010959E-15
tp -4.486671519006828E-13 1.631667922887038E-12 1.530829806883681E-8 1.67195726012345E-11 2.907351275097284E-9 2.884670325258094E-12
node -1.962257505982931E-15 4.838628991107372E-15 1.67195726012345E-11 1.583322657875805E-10 -1.494353999672135E-10 -1.395275539015085E-12
peri -7.950979512967496E-14 2.943145386129578E-13 2.907351275097284E-9 -1.494353999672135E-10 7.0625200813398E-10 1.95678856056202E-12
i -2.29171097555253E-16 1.109534078010959E-15 2.884670325258094E-12 -1.395275539015085E-12 1.95678856056202E-12 1.688660907753751E-11

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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-25 00:08 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin