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 ]  
4871 Riverside (1989 WH1)
Classification: Main-belt Asteroid          SPK-ID: 2004871
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1075646246447215 3.3129e-08  
a 2.258125623713003 6.3591e-09 au
q 2.015231188597686 7.6757e-08 au
i 2.893917937436266 3.4643e-06 deg
node 263.6342191690676 7.1129e-05 deg
peri 142.3663520612881 7.3149e-05 deg
M 255.4375698643366 1.7108e-05 deg
tp 2458960.492740104634
(2020-Apr-20.99274010)
5.9279e-05 TDB
period 1239.425922575859
3.39
5.2355e-06
1.433e-08
d
yr
n .2904570522874199 1.2269e-09 deg/d
Q 2.50102005882832 7.0431e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2252  
   data-arc span      14528 days (39.78 yr)  
   first obs. used      1980-01-22  
   last obs. used      2019-11-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45534  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 02:40:11  

Additional Information
 Earth MOID = 1.02512 au 
 Jupiter MOID = 2.81785 au 
 T_jup = 3.613 
[ 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 13.4   n/a MPO435745  
diameter diameter 5.082 km 0.402 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 6.051 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Hills, K. (2017) Minor Planet Bull. 44, 114-115.]
geometric albedo albedo 0.327   0.076 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

4871 Riverside (1989 WH1)          Discovered 1989-Nov-24 by Koishikawa, M. at Ayashi Station
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1989 WH1 = 1980 BN3 = 1982 UF = 1987 DU5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin