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15861 Ispahan (1996 HB12)
Classification: Main-belt Asteroid          SPK-ID: 2015861
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1338566934843243 3.7094e-08  
a 2.992343502708684 1.8221e-08 au
q 2.591798295666798 1.1199e-07 au
i 13.63958001150126 4.28e-06 deg
node 40.99714735827233 1.8637e-05 deg
peri 248.1353333115424 2.976e-05 deg
M 257.921419407475 2.7103e-05 deg
tp 2459932.602358989489
(2022-Dec-19.10235899)
0.00014389 TDB
period 1890.669405040188
5.18
1.7269e-05
4.728e-08
d
yr
n .1904087510171287 1.7392e-09 deg/d
Q 3.39288870975057 2.066e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2315  
   data-arc span      12331 days (33.76 yr)  
   first obs. used      1987-09-24  
   last obs. used      2021-06-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43105  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 03:57:15  

Additional Information
 Earth MOID = 1.61302 au 
 Jupiter MOID = 1.84099 au 
 T_jup = 3.200 
[ 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 12.63   n/a MPO614063  
diameter diameter 8.797 km 0.334 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 169.464 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.250   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15861 Ispahan           Discovered 1996 Apr. 17 by E. W. Elst at the European Southern Observatory.
Ispahan is an old and beautiful Persian-Iranian city about 340 km from Teheran. Van Eyck's poem De Tuinman en de Dood tells the story of a gardener who met Death in the garden of his master. Frightened by the prospect he requested his master's horse and fled to Ispahan, where Death was awaiting him.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060809/MPCPages.arcLast Updated: 2007-08-08

[ show close-approach data ]
Alternate Designations
 1996 HB12 = 1987 SN29 = 1998 QT1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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