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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1384689488555521 3.7565e-08  
a 2.99427367471989 1.8657e-08 au
q 2.579659746395576 1.1194e-07 au
i 12.20188332688626 5.4445e-06 deg
node 147.7368648920575 1.9995e-05 deg
peri 117.2386509603748 2.8891e-05 deg
M 208.1207789495239 2.2904e-05 deg
tp 2459798.920216973400
(2022-Aug-07.42021697)
0.00012424 TDB
period 1892.499027335004
5.18
1.7688e-05
4.843e-08
d
yr
n .1902246684411499 1.7779e-09 deg/d
Q 3.408887603044204 2.1241e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1498  
   data-arc span      10726 days (29.37 yr)  
   first obs. used      1991-05-11  
   last obs. used      2020-09-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51603  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-22 16:34:12  

Additional Information
 Earth MOID = 1.59129 au 
 Jupiter MOID = 1.85613 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)  
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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