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 ]  
65961 (1998 HC1)
Classification: Main-belt Asteroid          SPK-ID: 2065961
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1129453877485461 5.3723e-08  
a 2.651944243552943 1.3388e-08 au
q 2.352419372677331 1.4474e-07 au
i 11.84689641092274 5.251e-06 deg
node 168.8750576081517 1.9404e-05 deg
peri 28.54434004610057 2.6157e-05 deg
M 63.65953336776131 1.7478e-05 deg
tp 2458721.563106225287
(2019-Aug-26.06310623)
7.5861e-05 TDB
period 1577.411527332217
4.32
1.1945e-05
3.27e-08
d
yr
n .2282219913841043 1.7283e-09 deg/d
Q 2.951469114428555 1.4901e-08 au
  Orbit Determination Parameters
   # obs. used (total)      784  
   data-arc span      7680 days (21.03 yr)  
   first obs. used      1998-04-18  
   last obs. used      2019-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58933  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 14:49:05  

Additional Information
 Earth MOID = 1.35924 au 
 Jupiter MOID = 2.01623 au 
 T_jup = 3.351 
[ 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 15.1   n/a MPO436241  
diameter diameter 5.128 km 0.084 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.074   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

65961 (1998 HC1)          Discovered 1998-Apr-18 by Spacewatch at Kitt Peak
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 HC1 = 2002 CV56 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Mar-29 04:05 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin