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 ]  
49538 (1999 CH61)
Classification: Main-belt Asteroid          SPK-ID: 2049538
[ 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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1072210719953749 6.1259e-08  
a 3.13900591938995 2.687e-08 au
q 2.802438339713132 1.9863e-07 au
i 5.1934137518894 6.6142e-06 deg
node 182.8929706056407 5.2508e-05 deg
peri 350.2217465604638 5.757e-05 deg
M 201.0810790338379 2.3631e-05 deg
tp 2459497.225945659207
(2021-Oct-09.72594566)		 0.00013716 TDB
period 2031.358748692053
5.56		 2.6083e-05
7.141e-08		 d
yr
n .1772212811901374 2.2756e-09 deg/d
Q 3.475573499066767 2.9751e-08 au
   Orbit Determination Parameters
   # obs. used (total)      976  
   data-arc span      7619 days (20.86 yr)  
   first obs. used      1999-01-14  
   last obs. used      2019-11-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53898  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 03:43:57  

Additional Information
 Earth MOID = 1.80813 au 
 Jupiter MOID = 1.49284 au 
 T_jup = 3.196 
[ 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 14.2   n/a MPO359073  
diameter diameter 7.574 km 0.214 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.045   0.001 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49538 (1999 CH61)          Discovered 1999-Feb-12 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 CH61 = 2000 JQ55 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jan-20 17:51 UT
(server date/time)   		NASA Home Page
Site Manager:   Ryan S. Park
Webmaster:   Alan B. Chamberlin