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 ]  
74642 (1999 RJ61)
Classification: Main-belt Asteroid          SPK-ID: 2074642
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1113562952967561 4.7479e-08  
a 2.263125185584649 9.5835e-09 au
q 2.011111949125159 1.0975e-07 au
i 1.888386402781936 5.2654e-06 deg
node 179.0062060054481 0.00010614 deg
peri 187.376384886262 0.00010749 deg
M 7.985372719596978 1.8841e-05 deg
tp 2458972.916207031793
(2020-May-03.41620703)
6.4995e-05 TDB
period 1243.544392634901
3.40
7.8989e-06
2.163e-08
d
yr
n .2894950933253046 1.8388e-09 deg/d
Q 2.51513842204414 1.0651e-08 au
  Orbit Determination Parameters
   # obs. used (total)      705  
   data-arc span      9353 days (25.61 yr)  
   first obs. used      1994-01-10  
   last obs. used      2019-08-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53964  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 02:43:59  

Additional Information
 Earth MOID = 1.00937 au 
 Jupiter MOID = 2.92718 au 
 T_jup = 3.609 
[ 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 16.3   n/a MPO235106  
rotation period rot_per 7.471 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Masiero, J.; Jedicke, R.; Durecy, J.; Gwyn, S.; et al. (2009) Icarus 204, 145-171.]

74642 (1999 RJ61)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 RJ61 = 1996 XT8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jul-05 15:13 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin