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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1662619662755719 3.4893e-08  
a 2.763590444924591 1.2385e-08 au
q 2.304110463571046 9.5349e-08 au
i 7.55057852295088 3.469e-06 deg
node 284.290409230128 3.1499e-05 deg
peri 210.4671006040846 3.3347e-05 deg
M 148.389768762513 1.1213e-05 deg
tp 2458508.811734646088
(2019-Jan-25.31173465)
5.1761e-05 TDB
period 1678.065661830952
4.59
1.1281e-05
3.089e-08
d
yr
n .2145327254996689 1.4422e-09 deg/d
Q 3.223070426278136 1.4444e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2427  
   data-arc span      17434 days (47.73 yr)  
   first obs. used      1973-01-01  
   last obs. used      2020-09-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40407  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 15:15:18  

Additional Information
 Earth MOID = 1.32206 au 
 Jupiter MOID = 1.86178 au 
 T_jup = 3.308 
[ 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 12.53   n/a MPCxxxxx  
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 7.070 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Carreño, A.; Fornas, G.; Arce, E.; Mas, V. (2020) Minor Planet Bull. 47, 7-10.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
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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