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12621 Alsufi (6585 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2012621
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1286317941506762 4.5339e-08  
a 3.112188850449562 1.5084e-08 au
q 2.711862414880505 1.461e-07 au
i 2.432859134085326 4.0723e-06 deg
node 147.876464065743 9.3006e-05 deg
peri 203.6272766573443 9.3975e-05 deg
M 322.6287628011357 1.3197e-05 deg
tp 2459208.676793801266
(2020-Dec-25.17679380)
7.3767e-05 TDB
period 2005.383053540795
5.49
1.458e-05
3.992e-08
d
yr
n .1795168256580047 1.3051e-09 deg/d
Q 3.51251528601862 1.7025e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1552  
   data-arc span      21861 days (59.85 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-08-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52087  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 00:35:23  

Additional Information
 Earth MOID = 1.70633 au 
 Jupiter MOID = 1.91204 au 
 T_jup = 3.204 
[ 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 13.9   n/a MPO350902  
rotation period rot_per 4.719 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.]

12621 Alsufi           Discovered 1960 Sept. 24 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
The Persian astronomer Abd al-Rahman al-Sufi (Azophi; 903-986) worked in Isfahan. His influential star atlas, completed around 964 and based on both Ptolemy's Almagest and pre-Islamic star lore, contains the earliest description of the Andromeda Galaxy, M 31.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20080122/MPCPages.arcLast Updated: 2008-03-05

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Alternate Designations
 6585 P-L = 1997 JJ12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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