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
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
245142 (2004 RQ257)
Classification: Main-belt Asteroid          SPK-ID: 2245142
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1523415738641864 5.5095e-08  
a 2.847360908722811 2.357e-08 au
q 2.413589466528618 1.5787e-07 au
i 4.92130520657487 6.0059e-06 deg
node 1.030652758860552 8.4857e-05 deg
peri 37.55005935493038 8.9559e-05 deg
M 74.10752207848259 2.7367e-05 deg
tp 2458639.238238102526
(2019-Jun-04.73823810)
0.00013196 TDB
period 1754.939723195148
4.80
2.1791e-05
5.966e-08
d
yr
n .2051352506538302 2.5472e-09 deg/d
Q 3.281132350917005 2.7161e-08 au
  Orbit Determination Parameters
   # obs. used (total)      295  
   data-arc span      7423 days (20.32 yr)  
   first obs. used      1999-09-07  
   last obs. used      2020-01-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51545  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-30 02:59:31  

Additional Information
 Earth MOID = 1.42316 au 
 Jupiter MOID = 2.16207 au 
 T_jup = 3.284 
[ show covariance matrix ]

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 15.8   n/a MPO454804  
diameter diameter 4.967 km 0.160 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.045   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

245142 (2004 RQ257)          Discovered 2004-Sep-09 by LONEOS at Anderson Mesa
Reference: 20100726/Numbers.arcLast Updated: 2010-07-28

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Apr-01 12:29 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin