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4562 Poleungkuk (1979 UD2)
Classification: Main-belt Asteroid          SPK-ID: 2004562
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1410238979734603 1.4784e-08  
a 2.471577498476446 7.8755e-09 au
q 2.123026005497804 3.6012e-08 au
i 3.420966934270206 4.1675e-07 deg
node 263.9686510523957 3.1266e-06 deg
peri 36.25771600706472 1.0019e-05 deg
M 291.160435354715 1.2425e-05 deg
tp 2459471.890968109665
(2021-Sep-14.39096811)
4.9756e-05 TDB
period 1419.252852961953
3.89
6.7835e-06
1.857e-08
d
yr
n .2536545896305137 1.2124e-09 deg/d
Q 2.820128991455089 8.9861e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3140  
   data-arc span      24007 days (65.73 yr)  
   first obs. used      1955-06-23  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46609  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:30:29  

Additional Information
 Earth MOID = 1.10655 au 
 Jupiter MOID = 2.37642 au 
 T_jup = 3.467 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.02   n/a E2021B10  
diameter diameter 15.006 km 0.078 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 9.477 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Behrend, R. (2018) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.050   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

4562 Poleungkuk           Discovered 1979 Oct. 21 at the Purple Mountain Observatory.
This name celebrates the 125th anniversary of the founding of Po Leung Kuk, a famous charity in Hong Kong. With a firm commitment to care and protection for the young and the innocent, Po Leung Kuk serves the local community.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20031110/MPCPages.arcLast Updated: 2003-11-12

[ show close-approach data ]
Alternate Designations
 1979 UD2 = 1955 MH1 = 1955 MN = 1967 RU = 1973 AW1 = 1983 YU = 1987 WY4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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