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3549 Hapke (1981 YH)
Classification: Main-belt Asteroid          SPK-ID: 2003549
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1668098625455151 3.6415e-08  
a 2.76079443816723 1.293e-08 au
q 2.300266697420132 1.0017e-07 au
i 7.554478804423348 3.5231e-06 deg
node 284.2890132508264 3.4761e-05 deg
peri 210.1212219106108 3.6712e-05 deg
M 105.8423741357599 1.2092e-05 deg
tp 2458507.886163575538
(2019-Jan-24.38616358)
5.589e-05 TDB
period 1675.519682554909
4.59
1.177e-05
3.222e-08
d
yr
n .2148587114482926 1.5094e-09 deg/d
Q 3.221322178914328 1.5086e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2237  
   data-arc span      17282 days (47.32 yr)  
   first obs. used      1973-01-01  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4164  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:55:43  

Additional Information
 Earth MOID = 1.31828 au 
 Jupiter MOID = 1.86449 au 
 T_jup = 3.309 
[ 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 12.5   n/a MPO473814  
diameter diameter 9.135 km 0.374 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 7.071 h n/a LCDB (Rev. 2019-August); 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.]
geometric albedo albedo 0.260   0.042 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

3549 Hapke (1981 YH)          Discovered 1981-Dec-30 by Bowell, E. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1981 YH = 1964 DC = 1973 AE1 = 1980 PO1 = 1982 BQ8 = 1985 TQ3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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