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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06582138950760315 3.791e-08  
a 2.180209043690621 5.0726e-09 au
q 2.036704655017861 8.174e-08 au
i 5.074385779308769 3.7043e-06 deg
node 187.4918561408744 3.9946e-05 deg
peri 339.5363285923 4.697e-05 deg
M 93.81734749758444 2.506e-05 deg
tp 2458694.073527832072
(2019-Jul-29.57352783)
8.1803e-05 TDB
period 1175.832966107834
3.22
4.1036e-06
1.124e-08
d
yr
n .3061659354488492 1.0685e-09 deg/d
Q 2.32371343236338 5.4065e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2998  
   data-arc span      30888 days (84.57 yr)  
   first obs. used      1936-04-23  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4203  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:01:55  

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. 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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1940-Jun-07 12:05 00:02 Thisb 0.0390203732191564 0.0390174392832761 0.0390233071876134 3.26663875918008 3.26663870568889 2429788.003156232 1.51837644835144 156.768544946251 17.9516963607443 21.3172675658111 123086.744167319 T 37 CATAB v2.0f-lin.ifort 2020-Dec-18 02:02:02 2020-Dec-18 02:02
1995-Jan-30 12:14 < 00:01 Iris 0.0281819056315111 0.0281807690510423 0.0281830422124567 5.51135734412068 5.51135730710855 2449748.009841766 0.183195770568418 57.1338524989983 35.0837982347815 -9.37569158055928 75367.8298665142 T 37 CATAB v2.0f-lin.ifort 2020-Dec-18 02:02:02 2020-Dec-18 02:02
2175-Jun-02 06:02 00:04 Thisb 0.0250088981129184 0.0250012640511698 0.0250165321746932 3.29249224899966 3.29249216619487 2515614.751498914 4.43186459726277 380.371584098697 17.0846967736706 0.14233775283019 9842.39082023284 T 37 CATAB v2.0f-lin.ifort 2020-Dec-18 02:02:02 2020-Dec-18 02:02
2197-Nov-06 08:23 < 00:01 Iris 0.0270148986375425 0.0270084140399518 0.0270213860147959 5.57372228273696 5.57372224455798 2523807.849387510 0.178613930634774 541.615467143789 34.8425669879399 -53.5068715334926 93324.0294551175 T 37 CATAB v2.0f-lin.ifort 2020-Dec-18 02:02:02 2020-Dec-18 02:02

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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