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 ]  
21612 Chelsagloria (1999 JS57)
Classification: Main-belt Asteroid          SPK-ID: 2021612
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07001453907600647 1.6588e-08  
a 2.25466011064456 6.1102e-09 au
q 2.096801122224723 3.918e-08 au
i 6.111814089637959 6.0301e-07 deg
node 238.8116530041878 6.0434e-06 deg
peri 202.3364185964433 6.9647e-06 deg
M 290.1741996941341 9.1971e-06 deg
tp 2459440.346546883739
(2021-Aug-13.84654688)
3.209e-05 TDB
period 1236.573823714449
3.39
5.0267e-06
1.376e-08
d
yr
n .291126977699256 1.1834e-09 deg/d
Q 2.412519099064396 6.538e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2412  
   data-arc span      14672 days (40.17 yr)  
   first obs. used      1980-12-10  
   last obs. used      2021-02-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44952  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:50:23  

Additional Information
 Earth MOID = 1.11312 au 
 Jupiter MOID = 2.74421 au 
 T_jup = 3.614 
[ 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 14.22   n/a E2021B10  
diameter diameter 4.157 km 0.099 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 42.946 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:
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
geometric albedo albedo 0.136   0.040 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

21612 Chelsagloria           Discovered 1999 May 10 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Chelsea Gloria Gordon (b. 1987) was awarded first place in the 2005 Intel International Science and Engineering Fair for her engineering team project. She also received the Intel Foundation Achievement Award. She attends the Half Hollow Hills High School East, Dix Hills, New York, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050822/MPCPages.arcLast Updated: 2005-08-26

Alternate Designations
 1999 JS57 = 1980 XO2 = 1990 VS13 = 1992 JL2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-20 11:59 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin