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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2276419253506816 1.1623e-08  
a 2.676899742957497 1.0635e-08 au
q 2.067525131499908 3.3605e-08 au
i 13.9601901179584 2.9725e-07 deg
node 207.3623185310637 3.4748e-06 deg
peri 116.7068170539922 5.8666e-06 deg
M 259.8083770876498 9.0689e-06 deg
tp 2459645.720852111533
(2022-Mar-07.22085211)
4.2083e-05 TDB
period 1599.729619115642
4.38
9.533e-06
2.61e-08
d
yr
n .2250380287382653 1.341e-09 deg/d
Q 3.286274354415087 1.3055e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2387  
   data-arc span      28293 days (77.46 yr)  
   first obs. used      1943-10-05  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41295  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 20:30:29  

Additional Information
 Earth MOID = 1.09769 au 
 Jupiter MOID = 2.29808 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 12.54   n/a MPCxxxxx  
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. 2020-October); 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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