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 ]  
74447 (1999 CH21)
Classification: Main-belt Asteroid          SPK-ID: 2074447
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08573929326132843 4.5462e-08  
a 3.034988010306283 2.416e-08 au
q 2.774770283246017 1.3318e-07 au
i 8.789432578297363 5.3691e-06 deg
node 313.5022501268779 2.9665e-05 deg
peri 94.74528075397005 4.6224e-05 deg
M 85.58344223682987 3.306e-05 deg
tp 2458541.385355393779
(2019-Feb-26.88535539)
0.00017809 TDB
period 1931.229543220134
5.29
2.306e-05
6.313e-08
d
yr
n .1864097415368531 2.2259e-09 deg/d
Q 3.295205737366548 2.6231e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1134  
   data-arc span      8704 days (23.83 yr)  
   first obs. used      1996-07-22  
   last obs. used      2020-05-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50587  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:43:39  

Additional Information
 Earth MOID = 1.80268 au 
 Jupiter MOID = 2.02549 au 
 T_jup = 3.218 
[ 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 14.0   n/a MPO412634  
diameter diameter 5.928 km 0.413 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.182   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

74447 (1999 CH21)          Discovered 1999-Feb-10 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 CH21 = 2002 SJ62 = 2002 TD125 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Nov-29 10:58 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin