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JPL Small-Body Database Browser
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2771 Polzunov (1978 SP7)
Classification: Main-belt Asteroid          SPK-ID: 2002771
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2271108954439124 3.9489e-08  
a 2.678177617574994 1.1893e-08 au
q 2.069934300689693 1.043e-07 au
i 13.95681860691002 5.0935e-06 deg
node 207.382410737709 1.7526e-05 deg
peri 116.6320348605298 2.0428e-05 deg
M 124.9079708914119 1.1895e-05 deg
tp 2458045.049779200739
(2017-Oct-18.54977920)
5.1191e-05 TDB
period 1600.875252881738
4.38
1.0663e-05
2.919e-08
d
yr
n .2248769848568547 1.4979e-09 deg/d
Q 3.286420934460295 1.4594e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1901  
   data-arc span      27810 days (76.14 yr)  
   first obs. used      1943-10-05  
   last obs. used      2019-11-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43023  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 20:39:54  

Additional Information
 Earth MOID = 1.10099 au 
 Jupiter MOID = 2.29458 au 
 T_jup = 3.299 
[ 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 12.5   n/a MPO452201  
diameter diameter 11.332 km 0.189 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 11.66 h n/a LCDB (Rev. 2019-January); 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:
[Stephens, R.D. (2005) Minor Planet Bull. 32, 2-3.]
[Chiorny, V.G.; Shevchenko, V.G.; Krugly, Yu.N.; Velichko, F.P.; Gaftonyuk, N.M. (2007) Planet. Space Sci. 55, 986-997.]
geometric albedo albedo 0.218   0.040 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

2771 Polzunov (1978 SP7)          Discovered 1978-Sep-26 by Zhuravleva, L. at Nauchnyj
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1978 SP7 = 1943 TG = 1981 EK6 = 1982 NB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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