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9718 Gerbefremov (1976 YR1)
Classification: Main-belt Asteroid          SPK-ID: 2009718
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1489001149783965 4.5672e-08  
a 2.364114037785677 1.3376e-08 AU
q 2.012097185737348 1.0628e-07 AU
i 5.924995145935197 5.8967e-06 deg
node 84.53168061034701 6.2494e-05 deg
peri 25.04834325632092 6.9415e-05 deg
M 141.1490442331549 2.9013e-05 deg
tp 2456479.933159605523
(2013-Jul-06.43315961)
0.00010521 JED
period 1327.703375960881
3.64
1.1268e-05
3.085e-08
d
yr
n .271144900674416 2.3012e-09 deg/d
Q 2.716130889834006 1.5368e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1001  
   data-arc span      22106 days (60.52 yr)  
   first obs. used      1954-12-21  
   last obs. used      2015-06-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53356  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:02:52  

Additional Information
 Earth MOID = 1.03051 AU 
 T_jup = 3.527 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.7 mag n/a MPO256936  
rotation period rot_per 6.2494 h n/a LCDB (Rev. 2015-July); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J., in press.]

9718 Gerbefremov           Discovered 1976 Dec. 16 by L. I. Chernykh at the Crimean Astrophysical Observatory.
Gerbert Alexandrovich Efremov (b. 1933), a well-known designer of space technology, created the Proton and Almaz space stations. He is a member of Tsiolkovsky Russian Academy of Cosmonautics and was decorated with the Leonardo da Vinci Medal of the International Association of Peace Foundations.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060413/MPCPages.arcLast Updated: 2006-04-17

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Alternate Designations
 1976 YR1 = 1992 FF1 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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