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21566 (1998 QM103)
Classification: Main-belt Asteroid          SPK-ID: 2021566
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05689892575934673 3.0583e-08  
a 2.890355669595872 1.284e-08 au
q 2.725897536933429 9.0714e-08 au
i 3.244209348969964 2.9898e-06 deg
node 91.41999309330643 6.9897e-05 deg
peri 229.9889757452484 8.0017e-05 deg
M 261.6175593558952 4.0632e-05 deg
tp 2459887.001624246861
(2022-Nov-03.50162425)
0.00020291 TDB
period 1794.838424141603
4.91
1.196e-05
3.274e-08
d
yr
n .2005751577177055 1.3366e-09 deg/d
Q 3.054813802258314 1.3571e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2158  
   data-arc span      14300 days (39.15 yr)  
   first obs. used      1982-05-15  
   last obs. used      2021-07-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47108  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 15:01:07  

Additional Information
 Earth MOID = 1.71368 au 
 Jupiter MOID = 2.12042 au 
 T_jup = 3.286 
[ 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 14.03   n/a MPO636387  
diameter diameter 5.229 km 0.365 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.084 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 0.195   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21566 (1998 QM103)          Discovered 1998-Aug-26 by Elst, E. W. at La Silla
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 QM103 = 1982 JZ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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