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18565 Selg (1997 GP35)
Classification: Main-belt Asteroid          SPK-ID: 2018565
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1216965757792364 3.6672e-08  
a 3.100324375034458 1.7693e-08 au
q 2.723025514787864 1.1074e-07 au
i 5.002861702246651 3.8416e-06 deg
node 201.72140755 4.5102e-05 deg
peri 289.5322330422832 4.7921e-05 deg
M 229.1481426835048 1.7973e-05 deg
tp 2460121.247155791572
(2023-Jun-25.74715579)
0.00010219 TDB
period 1993.926425162599
5.46
1.7069e-05
4.673e-08
d
yr
n .180548286765718 1.5456e-09 deg/d
Q 3.477623235281053 1.9847e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1256  
   data-arc span      10173 days (27.85 yr)  
   first obs. used      1993-08-15  
   last obs. used      2021-06-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53255  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 14:00:04  

Additional Information
 Earth MOID = 1.74329 au 
 Jupiter MOID = 1.60065 au 
 T_jup = 3.205 
[ 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 14.07   n/a E2021B10  
diameter diameter 8.629 km 0.215 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.054   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18565 Selg           Discovered 1997 Apr. 6 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Timothy Selg mentored a finalist in the 2012 Intel Science Talent Search, a science competition for high-school seniors. He teaches at the White Plains High School, White Plains, New York.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20120506/MPCPages.arcLast Updated: 2012-05-09

[ show close-approach data ]
Alternate Designations
 1997 GP35 = 1993 PG9 = 1994 UD13 = 1996 AJ20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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