Elinor Gates' Asteroid

Asteroid (2650) Elinor


Asteroid 2650 (original designation 1931EG) was discovered 14 March 1931 by M. Wolf In Heidelberg.

This asteroid was named for me in 1989 for work I had done as a summer student at the IAU Minor Planet Center with Dr. Brian Marsden.

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Heliocentric osc. elements wrt ecliptic and mean equinox of J2000.0:
  EPOCH=  2451200.5 != 1999-Jan-22.0000000 (TDB)                               
    EC= .198098763         QR= 2.112688759        TP= 2450741.7289591          
    OM= 332.6346944        W= 22.1494127          IN= 13.9737276               
Asteroid physical parameters:
    GM= n.a.               RAD= n.a.              ROTPER= n.a.                 
    H= 11.5                G= .150                B-V= n.a.                    
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H = 11.5 corresponds to a diameter between 13 and 30km. Actual size depends on the albedo of the asteroid (usually somewhere between 0.05 and 0.25).

Info from Lowell Observatory:
I'll make this pretty later.....
Orbit computer: E. Bowell
Absolute Magnitude H: 11.5
Slope Parameter G: 0.15
Color Index B-V: ??
IRAS diameter: ??
IRAS Taxonomic Classification: ??
Six Integer Codes: 0 0 0 0 0 0
Orbital arc (days): 24802
Number of Observations used in orbit computation: 49
Epoch of Osculation: 1999 May 02
Mean Anomaly: 128.757516 deg
Argument of Perihelion: 22.174697 deg (J2000.0)
Longitude of Ascending Node: 332.636010 deg (J2000.0)
Inclination: 13.972883 deg (J2000.0)
Eccentricity: 0.19801767
Semimajor Axis: 2.63488898 AU
Date of Orbit Computation: 1999 March 04 MST
Absolute value of the current 1-sigma ephemeris uncertainty (CEU): 1.8e-1 arcsec
Rate of change of CEU: -1.1e-3 arcsec/day
Date of CEU: 1999 March 26 (0hr UT)
Next peak ephemeris uncertainty (PEU) from date of CEU: 3.2e-1 arcsec, Date: 2000 April 07
Greatest PEU in 10 years from date of CEU: 4.3e-1 arcsec, Date: 2005 June 12
Greatest PEU in 10 years from date of next PEU: 3.9e-1 arcsec, Date: 2005 June 12


After wanting to get images of Asteroid 2650 for 10 years, I finally managed to do it! If the weather had cooperated I would have gotten good science data. Unfortunately, fog and clouds did me in and cut my observing short.

Data taken on 8 March 1999 UT with the Nickel 40" Telecope at Lick Observatory using Dewar #5 with pixel scale 0.56 arcsec/pixel and field of view 4.4 arminutes. Field center at approximately 07 48 29 +28 31 12 (J2000). North is up, East is left.


Digital Sky Survey Reference frame. Notice how the asteroid is not visible here and shifts position in the following images.


V-Band Image, 5 minute exposure started at 4:47:51.0 UT


B-Band Image, 5 minute exposure started at 5:08:08.0 UT


R-Band Image, 5 minute exposure started at 5:19:09.0 UT, Fog started rolling in half way through....