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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1487039313288932 4.4876e-08  
a 2.364433594704553 1.3197e-08 au
q 2.012833023805879 1.0464e-07 au
i 5.924166144321873 5.2079e-06 deg
node 84.52550645214967 5.43e-05 deg
peri 25.10467834854731 5.9593e-05 deg
M 249.5233002681669 2.5802e-05 deg
tp 2457808.027856473930
(2017-Feb-23.52785647)
9.7305e-05 JED
period 1327.972583239119
3.64
1.1118e-05
3.044e-08
d
yr
n .2710899340420925 2.2696e-09 deg/d
Q 2.716034165603227 1.5159e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1064  
   data-arc span      22231 days (60.87 yr)  
   first obs. used      1954-12-21  
   last obs. used      2015-11-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52696  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Nov-30 16:03:30  

Additional Information
 Earth MOID = 1.03117 au 
 Jupiter MOID = 2.41027 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 13.9 mag n/a MPO344381  
rotation period rot_per 6.2494 h n/a LCDB (Rev. 2015-December); 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. 150, A75.]

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

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