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20182 (1997 AS)
Classification: Main-belt Asteroid          SPK-ID: 2020182
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1933165632413505 2.7665e-08  
a 2.445874847163398 8.3541e-09 au
q 1.973046727591306 6.8281e-08 au
i 5.684789701916643 3.2044e-06 deg
node 114.0049424670993 3.718e-05 deg
peri 174.436755283358 3.8683e-05 deg
M 289.0251774723201 1.318e-05 deg
tp 2459475.955588380779
(2021-Sep-18.45558838)
5.2076e-05 TDB
period 1397.171677018382
3.83
7.1582e-06
1.96e-08
d
yr
n .2576633966473281 1.3201e-09 deg/d
Q 2.918702966735489 9.9691e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1947  
   data-arc span      8843 days (24.21 yr)  
   first obs. used      1997-01-02  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50838  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 03:01:36  

Additional Information
 Earth MOID = .954856 au 
 Jupiter MOID = 2.25706 au 
 T_jup = 3.466 
[ 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 14.35   n/a E2021B10  
diameter diameter 4.023 km 0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 9.64425 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 0.214   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20182 (1997 AS)          Discovered 1997-Jan-02 by Kobayashi, T. at Oizumi
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1997 AS = 1998 KL8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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