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4512 Sinuhe (1939 BM)
Classification: Main-belt Asteroid          SPK-ID: 2004512
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .207946766483371 3.2723e-08  
a 2.765021142099207 1.1967e-08 au
q 2.190043936341519 9.3753e-08 au
i 10.33398819995867 3.466e-06 deg
node 119.4023086836265 2.4054e-05 deg
peri 357.5041286340272 2.6431e-05 deg
M 284.6025994312707 1.2632e-05 deg
tp 2459552.222364338141
(2021-Dec-03.72236434)
6.0201e-05 TDB
period 1679.368919971039
4.60
1.0902e-05
2.985e-08
d
yr
n .2143662394360664 1.3917e-09 deg/d
Q 3.339998347856894 1.4455e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2710  
   data-arc span      29981 days (82.08 yr)  
   first obs. used      1939-01-20  
   last obs. used      2021-02-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39462  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:26:58  

Additional Information
 Earth MOID = 1.20624 au 
 Jupiter MOID = 1.76573 au 
 T_jup = 3.285 
[ 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 11.73   n/a E2021B10  
diameter diameter 10.767 km 0.334 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 18.00 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:
[Bennefeld, C.; Cantue, J.; Holly, V.; Jordon, L.; Martin, T.; Soar, E.; Swinney, T. (2009) Minor Planet Bull. 36, 45-48.]
geometric albedo albedo 0.265   0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
SMASSII spectral type spec_B Sa   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

4512 Sinuhe (1939 BM)          Discovered 1939-Jan-20 by Vaisala, Y. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1939 BM = 1939 CE1 = 1979 WR7 = 1987 OE1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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