Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
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 ]  
21045 (1990 SQ1)
Classification: Main-belt Asteroid          SPK-ID: 2021045
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .195732025896569 1.2837e-07  
a 2.670236855454963 2.69e-08 AU
q 2.147585986113079 3.3333e-07 AU
i 11.74620104909853 1.0501e-05 deg
node 344.3310165432678 3.9644e-05 deg
peri 9.084551147607799 4.4054e-05 deg
M 158.206095497823 2.2543e-05 deg
tp 2456100.103741753404
(2012-Jun-21.60374175)
9.4861e-05 JED
period 1593.760671327889
4.36
2.4084e-05
6.594e-08
d
yr
n .2258808405028939 3.4133e-09 deg/d
Q 3.192887724796846 3.2166e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      604  
   data-arc span      8606 days (23.56 yr)  
   first obs. used      1990-08-27  
   last obs. used      2014-03-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57523  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 14:16:08  

Additional Information
 Earth MOID = 1.14149 AU 
 T_jup = 3.324 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.8 mag n/a MPO279733  

21045 (1990 SQ1)          Discovered 1990-Sep-18 by Holt, H. E. at Palomar (675)
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1990 SQ1 = 1990 QC18 = 1990 RE17 = 1999 XN114 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2014-Apr-23 11:48 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin