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20963 Pisarenko (1977 QN1)
Classification: Main-belt Asteroid          SPK-ID: 2020963
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 51 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1831097127667181 1.3292e-08  
a 2.61735222488403 1.1287e-08 au
q 2.138089610776185 3.3629e-08 au
i 12.9088138616494 5.8339e-07 deg
node 343.2117914032437 3.4606e-06 deg
peri 308.8534458894139 6.2475e-06 deg
M 119.0344993672923 5.4754e-06 deg
tp 2458689.098459225433
(2019-Jul-24.59845923)
2.1855e-05 TDB
period 1546.648708209978
4.23
1.0005e-05
2.739e-08
d
yr
n .2327613232979374 1.5057e-09 deg/d
Q 3.096614838991875 1.3354e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3320  
   data-arc span      15906 days (43.55 yr)  
   first obs. used      1977-08-19  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .34735  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:35:22  

Additional Information
 Earth MOID = 1.14634 au 
 Jupiter MOID = 2.24506 au 
 T_jup = 3.347 
[ 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 13.19   n/a E2021B10  
diameter diameter 6.641 km 0.152 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.13968 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.304   0.053 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20963 Pisarenko           Discovered 1977 Aug. 19 by N. S. Chernykh at the Crimean Astrophysical Observatory.
Georgij Stepanovich Pisarenko (1910-2000), a specialist in mechanics and in the theory of the strength of materials, was head of both the Ukrainian Space Research Committee and the faculty at Kiev Polytechnical Institute.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020624/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1977 QN1 = 1998 QA17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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