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JPL Small-Body Database Browser
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1516 Henry (1938 BG)
Classification: Main-belt Asteroid          SPK-ID: 2001516
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1855467080144408 4.5111e-08  
a 2.622310510205649 7.345e-09 au
q 2.135749427645322 1.1817e-07 au
i 8.745283776679159 3.4507e-06 deg
node 125.8340750470591 3.2938e-05 deg
peri 94.5677868886316 3.4091e-05 deg
M 356.0871092393056 8.8375e-06 deg
tp 2458617.358534655638
(2019-May-13.85853466)
3.8079e-05 TDB
period 1551.045722255877
4.25
6.5166e-06
1.784e-08
d
yr
n .2321014750464014 9.7516e-10 deg/d
Q 3.108871592765976 8.7078e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2267  
   data-arc span      29786 days (81.55 yr)  
   first obs. used      1938-01-28  
   last obs. used      2019-08-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47317  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-23 19:18:16  

Additional Information
 Earth MOID = 1.14941 au 
 Jupiter MOID = 1.93605 au 
 T_jup = 3.363 
[ 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 12.0   n/a MPO492768  
diameter diameter 26.442 km 0.150 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 17.370 h n/a LCDB (Rev. 2019-January); 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. (2002) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.039   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

1516 Henry (1938 BG)          Discovered 1938-Jan-28 by Patry, A. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1938 BG = 1938 DM 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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