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JPL Small-Body Database Browser
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136940 (1998 QG45)
Classification: Main-belt Asteroid          SPK-ID: 2136940
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2069444435425252 5.289e-08  
a 2.400812375837074 1.1508e-08 au
q 1.903977594669463 1.2761e-07 au
i 3.683842497048957 5.9534e-06 deg
node 240.4781670044144 7.3849e-05 deg
peri 132.9553281862164 7.4863e-05 deg
M 286.4440855165885 1.5379e-05 deg
tp 2459278.120068498042
(2021-Mar-04.62006850)
5.9387e-05 TDB
period 1358.738115910917
3.72
9.7695e-06
2.675e-08
d
yr
n .2649517193816638 1.905e-09 deg/d
Q 2.897647157004684 1.389e-08 au
  Orbit Determination Parameters
   # obs. used (total)      522  
   data-arc span      7565 days (20.71 yr)  
   first obs. used      1998-08-17  
   last obs. used      2019-05-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58398  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 07:13:34  

Additional Information
 Earth MOID = .907086 au 
 Jupiter MOID = 2.57975 au 
 T_jup = 3.494 
[ 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 16.0   n/a MPO469441  
rotation period rot_per 127.521 h n/a LCDB (Rev. 2019-August); 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.]

136940 (1998 QG45)          Discovered 1998-Aug-17 by LINEAR at Socorro
Reference: 20061205/Numbers.arcLast Updated: 2006-12-13
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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