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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1383826822659727 3.486e-08  
a 2.994213258808519 1.6827e-08 au
q 2.579865996778257 1.0629e-07 au
i 12.20292056152274 5.366e-06 deg
node 147.7341180792697 1.6811e-05 deg
peri 117.2893530271289 2.6744e-05 deg
M 246.1001305561401 2.3009e-05 deg
tp 2459799.246856190359
(2022-Aug-07.74685619)
0.00012368 TDB
period 1892.441749766631
5.18
1.5953e-05
4.368e-08
d
yr
n .1902304258740824 1.6036e-09 deg/d
Q 3.408560520838781 1.9156e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1795  
   data-arc span      10901 days (29.85 yr)  
   first obs. used      1991-05-11  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49688  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 00:04:59  

Additional Information
 Earth MOID = 1.58972 au 
 Jupiter MOID = 1.85561 au 
 T_jup = 3.206 
[ 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 13.3   n/a MPO458954  
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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