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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 | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06582138986763289 3.7939e-08  
a 2.180209043624266 5.0779e-09 au
q 2.036704654170934 8.1813e-08 au
i 5.07438572613206 3.7083e-06 deg
node 187.4918558743707 3.9957e-05 deg
peri 339.5363291462228 4.6986e-05 deg
M 93.81734729388502 2.5065e-05 deg
tp 2458694.073528511385
(2019-Jul-29.57352851)
8.1817e-05 TDB
period 1175.832966054154
3.22
4.108e-06
1.125e-08
d
yr
n .3061659354628264 1.0696e-09 deg/d
Q 2.323713433077597 5.4122e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2976  
   data-arc span      30864 days (84.50 yr)  
   first obs. used      1936-04-23  
   last obs. used      2020-10-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42084  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:16:49  

Additional Information
 Earth MOID = 1.04337 au 
 Jupiter MOID = 2.64237 au 
 T_jup = 3.673 
[ 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 12.1   n/a PDS3 (MPC 17262)  
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. 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:
[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

[ show close-approach data ]
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 | Close-Approach Data ]
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