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20203 (1997 ED25)
Classification: Main-belt Asteroid          SPK-ID: 2020203
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06135525135270758 4.3458e-08  
a 2.780049640505815 1.4957e-08 au
q 2.609478996039576 1.206e-07 au
i 6.519619437379963 4.2425e-06 deg
node 90.43256504450298 4.048e-05 deg
peri 269.5882459610727 5.4179e-05 deg
M 203.3542864469219 3.7422e-05 deg
tp 2459937.204406566042
(2022-Dec-23.70440657)
0.0001768 TDB
period 1693.079116869097
4.64
1.3664e-05
3.741e-08
d
yr
n .2126303469301098 1.716e-09 deg/d
Q 2.950620284972053 1.5875e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1182  
   data-arc span      10638 days (29.13 yr)  
   first obs. used      1992-01-29  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53044  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:15:03  

Additional Information
 Earth MOID = 1.61438 au 
 Jupiter MOID = 2.34395 au 
 T_jup = 3.321 
[ 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 14.63   n/a E2021B10  
diameter diameter 3.356 km 0.924 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 41.9738 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.207   0.099 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20203 (1997 ED25)          Discovered 1997-Mar-07 by Spacewatch at Kitt Peak
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1997 ED25 = 1998 KX40 = 1999 RK185 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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