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3275 Oberndorfer (1982 HE1)
Classification: Main-belt Asteroid          SPK-ID: 2003275
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1798184127578191 2.1497e-08  
a 2.333040191680529 6.2761e-09 au
q 1.913516607512338 5.138e-08 au
i 8.57250593458812 1.1922e-06 deg
node 45.32333473823778 6.7272e-06 deg
peri 192.9639353974936 9.0714e-06 deg
M 348.5354921674593 6.7786e-06 deg
tp 2459437.950967541926
(2021-Aug-11.45096754)
2.4559e-05 TDB
period 1301.612640774519
3.56
5.2522e-06
1.438e-08
d
yr
n .2765799814188831 1.116e-09 deg/d
Q 2.752563775848719 7.4047e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3645  
   data-arc span      20922 days (57.28 yr)  
   first obs. used      1964-03-16  
   last obs. used      2021-06-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40584  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-07 22:21:07  

Additional Information
 Earth MOID = .903258 au 
 Jupiter MOID = 2.25137 au 
 T_jup = 3.533 
[ 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 13.41   n/a MPCxxxxx  
diameter diameter 10.831 km 0.061 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 9.23645 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 0.081   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

3275 Oberndorfer (1982 HE1)          Discovered 1982-Apr-25 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

Alternate Designations
 1982 HE1 = 1939 FJ = 1964 EE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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