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 ]  
4398 Chiara (1984 HC2)
Classification: Main-belt Asteroid          SPK-ID: 2004398
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06553544353462216 3.1326e-08  
a 2.365712659763604 8.5375e-09 au
q 2.210674631330526 7.6831e-08 au
i 4.970365295045537 3.6785e-06 deg
node 113.4680927733484 4.2796e-05 deg
peri 326.6444943800309 5.4433e-05 deg
M 339.5585591674146 3.4701e-05 deg
tp 2458675.965841859527
(2019-Jul-11.46584186)
0.0001282 TDB
period 1329.050299924159
3.64
7.1945e-06
1.97e-08
d
yr
n .2708701092957453 1.4663e-09 deg/d
Q 2.520750688196683 9.097e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2984  
   data-arc span      15538 days (42.54 yr)  
   first obs. used      1977-05-23  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42911  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 21:43:44  

Additional Information
 Earth MOID = 1.22837 au 
 Jupiter MOID = 2.60869 au 
 T_jup = 3.540 
[ 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 12.9   n/a MPO502195  
diameter diameter 6.871 km 0.199 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.215   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4398 Chiara (1984 HC2)          Discovered 1984-Apr-23 by Ferreri, W. at La Silla
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1984 HC2 = 1929 CB = 1977 KJ = 1980 DA3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jan-19 08:08 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin