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1642 Hill (1951 RU)
Classification: Main-belt Asteroid          SPK-ID: 2001642
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 .06671869166489915 3.4794e-08  
a 2.750686010697869 8.7279e-09 au
q 2.567163838883166 9.859e-08 au
i 10.80371184115602 3.7286e-06 deg
node 339.0449660885525 1.826e-05 deg
peri 149.8611056896252 3.4518e-05 deg
M 246.64689912331 2.9313e-05 deg
tp 2459525.175589759537
(2021-Nov-06.67558976)
0.00013602 TDB
period 1666.325939498631
4.56
7.9309e-06
2.171e-08
d
yr
n .2160441672703708 1.0283e-09 deg/d
Q 2.934208182512572 9.3102e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3013  
   data-arc span      41142 days (112.64 yr)  
   first obs. used      1908-03-27  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42556  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:01:52  

Additional Information
 Earth MOID = 1.5864 au 
 Jupiter MOID = 2.08787 au 
 T_jup = 3.317 
[ 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 10.8   n/a MPO452183  
diameter diameter 16.240 km 0.733 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 6.056 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2008) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.351   0.051 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
SMASSII spectral type spec_B S   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)

1642 Hill (1951 RU)          Discovered 1951-Sep-04 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1951 RU = 1929 XB = 1931 FO = 1940 DA = 1940 FE = 1942 RB = 1954 JS = 1956 TD1 = 1956 US = 1958 DJ = 1958 FL = A908 FC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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