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20087 (1994 PC7)
Classification: Main-belt Asteroid          SPK-ID: 2020087
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08535686046203392 3.5036e-08  
a 2.782771945879754 1.1792e-08 au
q 2.545243269197634 9.9632e-08 au
i 9.793545816022101 4.3226e-06 deg
node 146.47744368 1.9743e-05 deg
peri 44.20412689832744 3.075e-05 deg
M 16.22869230664913 2.3125e-05 deg
tp 2459124.064365169926
(2020-Oct-01.56436517)
0.00010885 TDB
period 1695.566593961035
4.64
1.0778e-05
2.951e-08
d
yr
n .2123184080661789 1.3496e-09 deg/d
Q 3.020300622561875 1.2799e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1979  
   data-arc span      10630 days (29.10 yr)  
   first obs. used      1992-02-06  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47811  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:12:55  

Additional Information
 Earth MOID = 1.55687 au 
 Jupiter MOID = 1.96327 au 
 T_jup = 3.306 
[ 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 13.75   n/a E2021B10  
diameter diameter 5.453 km 0.064 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.275 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.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.216   0.051 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20087 (1994 PC7)          Discovered 1994-Aug-10 by Elst, E. W. at La Silla
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1994 PC7 = 1992 CA7 = 1997 CW2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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