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 ]  
21171 (1994 CG1)
Classification: Main-belt Asteroid          SPK-ID: 2021171
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .198044305239305 3.4169e-08  
a 2.253195280000395 7.2639e-09 au
q 1.806962786204235 7.6039e-08 au
i 5.003269927303767 4.312e-06 deg
node 10.91359238215225 4.1253e-05 deg
peri 286.7720864351894 4.3031e-05 deg
M 255.3315041826369 1.5749e-05 deg
tp 2459755.678356003222
(2022-Jun-25.17835600)
5.5011e-05 TDB
period 1235.368934572099
3.38
5.9739e-06
1.636e-08
d
yr
n .2914109218107342 1.4092e-09 deg/d
Q 2.699427773796554 8.7025e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1751  
   data-arc span      10452 days (28.62 yr)  
   first obs. used      1992-10-27  
   last obs. used      2021-06-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51313  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:31:09  

Additional Information
 Earth MOID = .798797 au 
 Jupiter MOID = 2.52809 au 
 T_jup = 3.594 
[ 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 14.60   n/a MPCxxxxx  
diameter diameter 2.929 km 0.447 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 2.668 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.358   0.189 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21171 (1994 CG1)          Discovered 1994-Feb-07 by Kobayashi, T. at Oizumi
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1994 CG1 = 1998 KZ17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Aug-01 05:06 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin