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 ]  
2835 Ryoma (1982 WF)
Classification: Main-belt Asteroid          SPK-ID: 2002835
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0806827890920255 3.7515e-08  
a 2.744995683407939 9.528e-09 au
q 2.523521775625016 1.0329e-07 au
i 1.332322472554177 4.0398e-06 deg
node 5.274215831119047 0.00013632 deg
peri 350.1054818464281 0.00013795 deg
M 229.1113992616099 2.2435e-05 deg
tp 2460000.462883338873
(2023-Feb-24.96288334)
0.00010416 TDB
period 1661.157937172615
4.55
8.6489e-06
2.368e-08
d
yr
n .2167162988804907 1.1283e-09 deg/d
Q 2.966469591190862 1.0297e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3457  
   data-arc span      32333 days (88.52 yr)  
   first obs. used      1932-12-17  
   last obs. used      2021-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43205  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-07 22:00:07  

Additional Information
 Earth MOID = 1.51782 au 
 Jupiter MOID = 2.38974 au 
 T_jup = 3.343 
[ 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 12.16   n/a E2021B10  
diameter diameter 24.230 km 0.172 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 18.234 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.043   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

2835 Ryoma (1982 WF)          Discovered 1982-Nov-20 by Seki, T. at Geisei
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1982 WF = 1932 YB = 1941 WB = 1961 CB1 = 1963 QC = 1972 NT = 1975 EX3 = 1977 QF5 = 1977 RY7 = 1979 AA = 1980 GP = 1989 GQ8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jul-24 02:53 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin