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JPL Small-Body Database Browser
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20011 (1991 PD13)
Classification: Main-belt Asteroid          SPK-ID: 2020011
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2234743666277188 5.3585e-08  
a 2.593920576948759 1.4876e-08 au
q 2.014245818932528 1.4372e-07 au
i 2.795123464362593 5.6663e-06 deg
node 344.1224427995473 7.9221e-05 deg
peri 346.6350287244333 7.9692e-05 deg
M 222.5167350904496 9.0448e-06 deg
tp 2459183.247977154200
(2020-Nov-29.74797715)
4.0177e-05 TDB
period 1525.925878422594
4.18
1.3126e-05
3.594e-08
d
yr
n .2359223374415442 2.0294e-09 deg/d
Q 3.17359533496499 1.82e-08 au
  Orbit Determination Parameters
   # obs. used (total)      900  
   data-arc span      11531 days (31.57 yr)  
   first obs. used      1987-09-29  
   last obs. used      2019-04-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60835  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 23:34:50  

Additional Information
 Earth MOID = 1.00275 au 
 Jupiter MOID = 2.18938 au 
 T_jup = 3.381 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.3   n/a MPO279723  
rotation period rot_per 9.350 h n/a LCDB (Rev. 2019-January); 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.]

20011 (1991 PD13)          Discovered 1991-Aug-05 by Holt, H. E. at Palomar
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 PD13 = 1987 SW4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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