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7607 Billmerline (1995 SB13)
Classification: Main-belt Asteroid          SPK-ID: 2007607
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0811974079960756 3.3308e-08  
a 2.783609073040358 1.1687e-08 au
q 2.557587231435122 9.333e-08 au
i 4.475545554926998 3.7134e-06 deg
node 174.2052184227302 4.593e-05 deg
peri 178.3148484578101 5.1067e-05 deg
M 115.7903791631151 2.2469e-05 deg
tp 2458454.891952654589
(2018-Dec-02.39195265)
0.00010582 TDB
period 1696.331754537662
4.64
1.0683e-05
2.925e-08
d
yr
n .2122226380759574 1.3365e-09 deg/d
Q 3.009630914645594 1.2636e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2405  
   data-arc span      25274 days (69.20 yr)  
   first obs. used      1951-02-10  
   last obs. used      2020-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47151  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:48:32  

Additional Information
 Earth MOID = 1.55198 au 
 Jupiter MOID = 2.35342 au 
 T_jup = 3.323 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.0   n/a MPO452276  
diameter diameter 12.396 km 4.048 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
geometric albedo albedo 0.055   0.040 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

7607 Billmerline           Discovered 1995 Sept. 18 by Spacewatch at Kitt Peak.
Named in honor of William J. Merline (b. 1954), planetary scientist at the Southwest Research Institute in Boulder, Colorado, and a dedicated instrumentalist and observer. While a graduate student at the University of Arizona's Lunar and Planetary Laboratory he codiscovered periodic variations of the radial velocity of the star Arcturus. He made thousands of hours of observations for a search for planets orbiting other stars and a study of the stability of the solar spectrum. He is now a member of the imaging team of the Galileo mission, studying cratering records from spacecraft imagery. He is also conducting a search for satellites of minor planets using coronagraphic imaging with groundbased telescopes.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990202/MPCPages.arcLast Updated: 2010-06-11

Alternate Designations
 1995 SB13 = 1951 CD = 1981 RE4 = 1981 SR3 = 1986 UU2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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