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JPL Small-Body Database Browser
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18486 (1996 AS2)
Classification: Main-belt Asteroid          SPK-ID: 2018486
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 .1794863810866501 3.5828e-08  
a 3.15817703861866 1.8101e-08 au
q 2.591327271126043 1.1141e-07 au
i 1.995849612317966 4.752e-06 deg
node 38.76930173340437 0.0001224 deg
peri 47.52030101759569 0.00012333 deg
M 159.1326111987577 1.5779e-05 deg
tp 2458094.329702396458
(2017-Dec-06.82970240)
8.55e-05 TDB
period 2049.996570029398
5.61
1.7625e-05
4.825e-08
d
yr
n .1756100499206384 1.5098e-09 deg/d
Q 3.725026806111276 2.135e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1565  
   data-arc span      12496 days (34.21 yr)  
   first obs. used      1985-02-20  
   last obs. used      2019-05-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49042  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:36:27  

Additional Information
 Earth MOID = 1.60813 au 
 Jupiter MOID = 1.50743 au 
 T_jup = 3.179 
[ 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 13.6   n/a MPO474011  
diameter diameter 8.975 km 0.202 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.62 h n/a LCDB (Rev. 2019-August); 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:
[Warner, B.D. (2013) Minor Planet Bull. 40, 137-145.]
geometric albedo albedo 0.060   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18486 (1996 AS2)          Discovered 1996-Jan-13 by Kobayashi, T. at Oizumi
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1996 AS2 = 1985 DQ3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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