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1651 Behrens (1936 HD)
Classification: Main-belt Asteroid          SPK-ID: 2001651
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06657629662166593 1.8884e-08  
a 2.179325891269611 4.5471e-09 au
q 2.034234444297169 4.1601e-08 au
i 5.077660035392484 5.1769e-07 deg
node 187.4404524701803 3.9411e-06 deg
peri 339.840630951948 6.1945e-06 deg
M 214.77421316741 6.3111e-06 deg
tp 2459870.548669487832
(2022-Oct-18.04866949)
2.0779e-05 TDB
period 1175.11858422462
3.22
3.6778e-06
1.007e-08
d
yr
n .3063520608326855 9.588e-10 deg/d
Q 2.324417338242053 4.8499e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3086  
   data-arc span      31110 days (85.17 yr)  
   first obs. used      1936-04-23  
   last obs. used      2021-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42019  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 12:37:53  

Additional Information
 Earth MOID = 1.04164 au 
 Jupiter MOID = 2.63967 au 
 T_jup = 3.674 
[ 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 12.17   n/a E2021B10  
diameter diameter 8.963 km 0.113 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 34.34 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:
[Behrend, R. (2001) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.318   0.052 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1651 Behrens           Discovered 1936 Apr. 23 by M. Laugier at Nice.
Named in memory of Johann Gerhard Behrens (1889-1978), pastor at Detern, well known for his orbit computations on comets and minor planets. Name proposed by O. Kippes, who found some of the identifications involving this planet.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC 5523Last Updated: 2006-03-21

Alternate Designations
 1936 HD = 1939 EJ = 1940 QD = 1944 YA = 1947 WA = 1950 TB4 = 1952 FF = 1952 HB = 1952 KG = 1958 BC = 1961 AB = 1963 UQ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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