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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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1905-Sep-05 03:10 00:03 Jupiter 1.82974935571362 1.82974883105586 1.82974988037138 4.11966071447545 4.00571715600079 2417093.631673811 2.80466056613099 170.92487002682 20.518094888355 -87.5139601403529 2241878.65063894 T 38 CATAB v2.0g-lin.ifort 2021-Jul-08 03:57:28 2021-Jul-08 03:57
1942-Jun-15 00:37 00:02 Jupiter 1.93744121333217 1.93744028820061 1.93744213846758 2.86647181341154 2.70966571911897 2430525.525593236 2.1140327544927 155.740010598892 7.10365563062922 -66.1641748717066 2442476.8092225 T 38 CATAB v2.0g-lin.ifort 2021-Jul-08 03:57:28 2021-Jul-08 03:57
1988-Mar-12 07:56 < 00:01 Jupiter 1.89988537144204 1.89988482041529 1.89988592247042 4.53998964934483 4.44070372559345 2447232.830407438 0.692412393119606 150.916841708517 19.0774088714115 -83.5660683032874 3111922.97412678 T 38 CATAB v2.0g-lin.ifort 2021-Jul-08 03:57:28 2021-Jul-08 03:57
2024-Dec-04 13:15 < 00:01 Jupiter 1.86291111830095 1.86291064385913 1.86291159274361 3.48090519894744 3.34773764736105 2460649.051850406 0.346254528488879 89.1825619194154 9.37668474707474 -77.3280526126041 2911525.44158527 T 38 CATAB v2.0g-lin.ifort 2021-Jul-08 03:57:28 2021-Jul-08 03:57
2107-Jun-05 23:10 00:02 Jupiter 1.84780683942681 1.84780634840301 1.84780733045091 4.04058752756698 3.9255013325981 2490781.465355832 2.42436573324635 158.487740339192 17.9229965018401 -85.8061640432859 2307355.13704087 T 38 CATAB v2.0g-lin.ifort 2021-Jul-08 03:57:28 2021-Jul-08 03:57
2144-Mar-26 11:53 00:04 Jupiter 1.96876361597021 1.96876230206936 1.96876492987924 2.58460925002699 2.41241447795017 2504224.995425198 3.89530722237275 229.564965938898 8.53457567020379 -60.170812044473 2179337.49737224 T 38 CATAB v2.0g-lin.ifort 2021-Jul-08 03:57:28 2021-Jul-08 03:57
2189-Dec-12 00:19 00:04 Jupiter 1.90225064096964 1.90224922101506 1.90225206092867 4.5316597674921 4.43231231993599 2520921.512939918 4.48420377098147 191.475781430341 34.2258382636253 -73.5490425173444 1658074.35232037 T 38 CATAB v2.0g-lin.ifort 2021-Jul-08 03:57:28 2021-Jul-08 03:57

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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