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13685 (1997 QG4)
Classification: Main-belt Asteroid          SPK-ID: 2013685
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1383114193544024 3.4658e-08  
a 2.993771389753213 1.6731e-08 au
q 2.579698619613844 1.0585e-07 au
i 12.20362115443818 5.3619e-06 deg
node 147.7343133330025 1.654e-05 deg
peri 117.3539508844691 2.6612e-05 deg
M 283.3115860956947 2.3167e-05 deg
tp 2459799.545087634367
(2022-Aug-08.04508763)
0.0001236 TDB
period 1892.022851449619
5.18
1.5861e-05
4.343e-08
d
yr
n .1902725433385635 1.595e-09 deg/d
Q 3.407844159892581 1.9045e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1882  
   data-arc span      10984 days (30.07 yr)  
   first obs. used      1991-05-11  
   last obs. used      2021-06-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49514  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 03:19:30  

Additional Information
 Earth MOID = 1.59115 au 
 Jupiter MOID = 1.85528 au 
 T_jup = 3.207 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.32   n/a MPCxxxxx  
diameter diameter 8.038 km 0.339 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.21918 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.207   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

13685 (1997 QG4)          Discovered 1997-Aug-27 by Shimizu, Y., Urata, T. at Nachi-Katsuura
Reference: 20000222/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1997 QG4 = 1991 JR1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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