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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08610023599777755 4.4923e-08  
a 3.033696446691027 2.1354e-08 au
q 2.77249446668531 1.3273e-07 au
i 8.789636558224503 4.475e-06 deg
node 313.5022747323162 2.9222e-05 deg
peri 94.543934000083 4.016e-05 deg
M 159.6138762861897 2.7686e-05 deg
tp 2458540.793649281000
(2019-Feb-26.29364928)
0.00014677 TDB
period 1929.996898931862
5.28
2.0378e-05
5.579e-08
d
yr
n .1865287971183988 1.9694e-09 deg/d
Q 3.294898426696744 2.3192e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1325  
   data-arc span      9086 days (24.88 yr)  
   first obs. used      1996-07-22  
   last obs. used      2021-06-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50415  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 22:55:02  

Additional Information
 Earth MOID = 1.79985 au 
 Jupiter MOID = 2.02763 au 
 T_jup = 3.219 
[ 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 14.10   n/a MPCxxxxx  
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

Alternate Designations
 1999 CH21 = 2002 SJ62 = 2002 TD125 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jul-29 00:51 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin