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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1962496230579953 1.107e-07  
a 2.66959070092951 2.4829e-08 au
q 2.145684532152964 2.8875e-07 au
i 11.74821548990534 9.9535e-06 deg
node 344.3298066411746 3.6833e-05 deg
peri 9.008663543585017 4.068e-05 deg
M 293.8997476617908 2.2824e-05 deg
tp 2457693.027072415812
(2016-Oct-31.52707242)
0.00010359 JED
period 1593.182209515075
4.36
2.2227e-05
6.085e-08
d
yr
n .225962854625131 3.1525e-09 deg/d
Q 3.193496869706056 2.9702e-08 au
  Orbit Determination Parameters
   # obs. used (total)      669  
   data-arc span      9008 days (24.66 yr)  
   first obs. used      1990-08-27  
   last obs. used      2015-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55877  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 16:38:32  

Additional Information
 Earth MOID = 1.13896 au 
 Jupiter MOID = 2.23423 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 13.9 mag n/a MPO337436  

21045 (1990 SQ1)          Discovered 1990-Sep-18 by Holt, H. E. at Palomar
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 2016-Feb-08 02:02 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin