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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1286317886302299 4.4197e-08  
a 3.112188847946191 1.4256e-08 au
q 2.711862429879818 1.4354e-07 au
i 2.432860065312934 4.0059e-06 deg
node 147.8765517932241 7.7018e-05 deg
peri 203.627186778694 7.8104e-05 deg
M 322.6287657318924 1.1831e-05 deg
tp 2459208.676777224283
(2020-Dec-25.17677722)
6.5941e-05 TDB
period 2005.38305112117
5.49
1.3779e-05
3.772e-08
d
yr
n .1795168258746034 1.2335e-09 deg/d
Q 3.512515266012564 1.609e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1769  
   data-arc span      21951 days (60.10 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50076  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:51:44  

Additional Information
 Earth MOID = 1.70633 au 
 Jupiter MOID = 1.91204 au 
 T_jup = 3.204 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457267.5 (2015-Sep-02.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1317614047739494 4.4176e-08  
q 2.69863325564277 1.4397e-07 au
tp 2457212.022333182221
(2015-Jul-08.52233318)
6.5408e-05 TDB
node 148.0566636072039 7.7232e-05 deg
peri 204.5629753022355 7.8265e-05 deg
i 2.430748014547797 4.0048e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1769  
   data-arc span      21951 days (60.10 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50076  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:51:44  

Additional Information
 Jupiter MOID = 1.91204 au 
 T_jup = 3.204 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.95154546854663E-15 -6.342076451559014E-15 4.431847860609913E-13 6.715096224216658E-15 1.086851458857207E-13 -5.655807158467552E-16
q -6.342076451559014E-15 2.072753224291844E-14 -1.551310991410181E-12 -2.274106823244621E-14 -3.729175448836974E-13 1.878708155537639E-15
tp 4.431847860609913E-13 -1.551310991410181E-12 4.278242392954166E-9 5.064303489557156E-12 8.408227395345697E-10 1.256372204193705E-13
node 6.715096224216658E-15 -2.274106823244621E-14 5.064303489557156E-12 5.96483570184417E-9 -5.958072717971158E-9 7.262861824684842E-11
peri 1.086851458857207E-13 -3.729175448836974E-13 8.408227395345697E-10 -5.958072717971158E-9 6.125357968630102E-9 -7.255356277154351E-11
i -5.655807158467552E-16 1.878708155537639E-15 1.256372204193705E-13 7.262861824684842E-11 -7.255356277154351E-11 1.603842193008196E-11

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

[ show close-approach data ]
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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