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
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 | Close-Approach Data ]

[ 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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08588302144860503 3.159e-08  
a 2.998768919006289 1.2027e-08 au
q 2.741225583615861 9.2843e-08 au
i 15.14600641119358 4.2605e-06 deg
node 197.9508161759494 1.3116e-05 deg
peri 252.0804847377334 2.7991e-05 deg
M 215.7281633382795 2.5638e-05 deg
tp 2459960.637202328363
(2023-Jan-16.13720233)
0.00013655 TDB
period 1896.762383914516
5.19
1.1411e-05
3.124e-08
d
yr
n .1897971000758862 1.1418e-09 deg/d
Q 3.256312254396716 1.306e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3015  
   data-arc span      39089 days (107.02 yr)  
   first obs. used      1913-10-31  
   last obs. used      2020-11-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43508  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:57:00  

Additional Information
 Earth MOID = 1.80023 au 
 Jupiter MOID = 2.02088 au 
 T_jup = 3.195 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456146.5 (2012-Aug-07.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09021725811556529 3.1747e-08  
q 2.724249275112398 9.4095e-08 au
tp 2456170.989333365456
(2012-Aug-31.48933337)
0.00012348 TDB
node 198.1819095528384 1.3104e-05 deg
peri 251.1791597504417 2.6839e-05 deg
i 15.16339360465764 4.2646e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3015  
   data-arc span      39089 days (107.02 yr)  
   first obs. used      1913-10-31  
   last obs. used      2020-11-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43508  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:57:00  

Additional Information
 Jupiter MOID = 2.02088 au 
 T_jup = 3.195 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.007857660866045E-15 -2.967642060246458E-15 -5.129727878409825E-13 -2.372084603045615E-15 -9.71473985931575E-14 -3.680470293704683E-16
q -2.967642060246458E-15 8.853842858585917E-15 1.831748460720774E-12 6.309725866007574E-15 3.450306150534011E-13 9.255650180562799E-16
tp -5.129727878409825E-13 1.831748460720774E-12 1.52465142767795E-8 1.071745893733828E-11 2.904239771402474E-9 2.635660092596935E-13
node -2.372084603045615E-15 6.309725866007574E-15 1.071745893733828E-11 1.717153513626911E-10 -1.635034167907749E-10 1.877196869204029E-12
peri -9.71473985931575E-14 3.450306150534011E-13 2.904239771402474E-9 -1.635034167907749E-10 7.20348401426539E-10 -1.729828416006299E-12
i -3.680470293704683E-16 9.255650180562799E-16 2.635660092596935E-13 1.877196869204029E-12 -1.729828416006299E-12 1.818659020203656E-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 43 CATAB v2.0f-lin.ifort 2020-Dec-18 01:57:08 2020-Dec-18 01:57
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 43 CATAB v2.0f-lin.ifort 2020-Dec-18 01:57:08 2020-Dec-18 01:57

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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-11 04:39 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin