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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 ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1860256436741623 3.9661e-08  
a 2.621969949513679 7.0521e-09 au
q 2.134216301961086 1.0291e-07 au
i 8.749262666016909 3.1683e-06 deg
node 125.8187250846379 2.7237e-05 deg
peri 94.37841407001396 2.8309e-05 deg
M 89.06128885424988 8.539e-06 deg
tp 2458616.857717016108
(2019-May-13.35771702)
3.6502e-05 TDB
period 1550.743579516597
4.25
6.2563e-06
1.713e-08
d
yr
n .232146697078198 9.3657e-10 deg/d
Q 3.109723597066272 8.3639e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2751  
   data-arc span      30241 days (82.80 yr)  
   first obs. used      1938-01-28  
   last obs. used      2020-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43894  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:01:06  

Additional Information
 Earth MOID = 1.14788 au 
 Jupiter MOID = 1.9343 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 17.599 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2002) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Polakis, T. (2019) Minor Planet Bull. 46, 400-406.]
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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