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58521 (1997 AC8)
Classification: Main-belt Asteroid          SPK-ID: 2058521
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0762230851254278 5.7416e-08  
a 2.968972717018027 1.9522e-08 au
q 2.742668456873689 1.8371e-07 au
i 8.193321940279063 5.8752e-06 deg
node 293.3599949832376 3.9986e-05 deg
peri 110.1446263055055 8.338e-05 deg
M 281.9137149786814 7.202e-05 deg
tp 2459405.803167490054
(2021-Jul-10.30316749)
0.00037582 TDB
period 1868.562965398908
5.12
1.8429e-05
5.046e-08
d
yr
n .1926614230648341 1.9002e-09 deg/d
Q 3.195276977162364 2.1009e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1048  
   data-arc span      8704 days (23.83 yr)  
   first obs. used      1997-01-02  
   last obs. used      2020-11-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51257  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 22:50:47  

Additional Information
 Earth MOID = 1.76577 au 
 Jupiter MOID = 2.11503 au 
 T_jup = 3.244 
[ 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 14.2   n/a MPO347911  
diameter diameter 4.874 km 0.181 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.129   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

58521 (1997 AC8)          Discovered 1997-Jan-02 by Spacewatch at Kitt Peak
Reference: 20030614/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1997 AC8 = 2000 RQ42 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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