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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06671868460083409 3.9937e-08  
a 2.750686008974281 9.8961e-09 au
q 2.567163856705599 1.1035e-07 au
i 10.80371079854246 4.7181e-06 deg
node 339.0449682248755 1.9044e-05 deg
peri 149.8611021131453 3.5228e-05 deg
M 246.646901474182 3.0243e-05 deg
tp 2459525.175578384951
(2021-Nov-06.67557839)
0.00014064 TDB
period 1666.325937932443
4.56
8.9924e-06
2.462e-08
d
yr
n .2160441674734318 1.1659e-09 deg/d
Q 2.934208161242963 1.0556e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2650  
   data-arc span      41039 days (112.36 yr)  
   first obs. used      1908-03-27  
   last obs. used      2020-08-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44751  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:38:10  

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. 2019-August); 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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