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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1286317878229579 4.4192e-08  
a 3.112188847149787 1.4237e-08 au
q 2.71186243169824 1.4354e-07 au
i 2.43286006038116 4.0059e-06 deg
node 147.8765580381279 7.6678e-05 deg
peri 203.6271798663124 7.7767e-05 deg
M 322.6287666229553 1.1803e-05 deg
tp 2459208.676772180701
(2020-Dec-25.17677218)
6.5781e-05 TDB
period 2005.38305035141
5.49
1.3761e-05
3.768e-08
d
yr
n .1795168259435104 1.2319e-09 deg/d
Q 3.512515262601335 1.6069e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1778  
   data-arc span      21964 days (60.13 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-11-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50032  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:49:54  

Additional Information
 Earth MOID = 1.70633 au 
 Jupiter MOID = 1.91204 au 
 T_jup = 3.204 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457283.5 (2015-Sep-18.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1317532910624584 4.417e-08  
q 2.69863136034483 1.4396e-07 au
tp 2457212.014722599941
(2015-Jul-08.51472260)
6.5296e-05 TDB
node 148.0566987305358 7.6892e-05 deg
peri 204.5611905848522 7.7927e-05 deg
i 2.430749479043048 4.0048e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1778  
   data-arc span      21964 days (60.13 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-11-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50032  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:49:54  

Additional Information
 Jupiter MOID = 1.91204 au 
 T_jup = 3.204 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.951021920473438E-15 -6.340839886546277E-15 4.405934437709558E-13 7.116623091930224E-15 1.078884026740049E-13 -5.659674883432685E-16
q -6.340839886546277E-15 2.072458231186188E-14 -1.545433409915358E-12 -2.406966693893586E-14 -3.707000510578046E-13 1.879966785882714E-15
tp 4.405934437709558E-13 -1.545433409915358E-12 4.263600357265072E-9 4.910684319477957E-12 8.387448635066689E-10 1.253475090591195E-13
node 7.116623091930224E-15 -2.406966693893586E-14 4.910684319477957E-12 5.912346297092859E-9 -5.905651514167877E-9 7.267256743990193E-11
peri 1.078884026740049E-13 -3.707000510578046E-13 8.387448635066689E-10 -5.905651514167877E-9 6.072666845660058E-9 -7.259752265477099E-11
i -5.659674883432685E-16 1.879966785882714E-15 1.253475090591195E-13 7.267256743990193E-11 -7.259752265477099E-11 1.603838335081728E-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. 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.]

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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