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4780 Polina (1979 HE5)
Classification: Main-belt Asteroid          SPK-ID: 2004780
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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05947496751236196 1.7687e-08  
a 2.170096697080198 5.5281e-09 au
q 2.04103026652267 3.9131e-08 au
i 4.680919751890924 3.4039e-07 deg
node 108.1498754410129 4.3867e-06 deg
peri 119.6242773831848 1.1685e-05 deg
M 3.237667555587041 1.3355e-05 deg
tp 2459189.998609499261
(2020-Dec-06.49860950)
4.33e-05 TDB
period 1167.661755062628
3.20
4.4618e-06
1.222e-08
d
yr
n .3083084621373861 1.1781e-09 deg/d
Q 2.299163127637728 5.8569e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3009  
   data-arc span      15024 days (41.13 yr)  
   first obs. used      1979-04-25  
   last obs. used      2020-06-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43905  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:45:42  

Additional Information
 Earth MOID = 1.0336 au 
 Jupiter MOID = 2.67789 au 
 T_jup = 3.683 
[ 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 14.21   n/a E2021B10  
diameter diameter 3.552 km 0.078 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.4883 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 0.423   0.066 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4780 Polina (1979 HE5)          Discovered 1979-Apr-25 by Chernykh, N. S. at Nauchnyj
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1979 HE5 = 1985 DK = 1988 CT1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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