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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1338630525812294 4.0133e-08  
a 2.992875277649005 2.087e-08 au
q 2.592239856988015 1.1803e-07 au
i 13.63889156410861 5.0358e-06 deg
node 41.01711033452043 1.8924e-05 deg
peri 247.9798799428175 3.0367e-05 deg
M 182.6995582783589 2.7005e-05 deg
tp 2459931.905229338814
(2022-Dec-18.40522934)
0.00014426 TDB
period 1891.173419005904
5.18
1.9781e-05
5.416e-08
d
yr
n .1903580054489313 1.9911e-09 deg/d
Q 3.393510698309995 2.3663e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1829  
   data-arc span      11899 days (32.58 yr)  
   first obs. used      1987-09-24  
   last obs. used      2020-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45867  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 04:16:19  

Additional Information
 Earth MOID = 1.61357 au 
 Jupiter MOID = 1.84176 au 
 T_jup = 3.199 
[ 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 12.6   n/a MPO458972  
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. 2019-August); 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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