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17685 (1997 AJ19)
Classification: Main-belt Asteroid          SPK-ID: 2017685
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04502060690585349 3.5382e-08  
a 2.801263307294376 1.3286e-08 au
q 2.675148733096885 1.0102e-07 au
i 1.932208333169478 3.8195e-06 deg
node 243.8303163568322 0.00011469 deg
peri 157.7424941028631 0.00012406 deg
M 64.37133880197435 4.5764e-05 deg
tp 2458694.290001897389
(2019-Jul-29.79000190)
0.00021785 TDB
period 1712.495053987581
4.69
1.2183e-05
3.336e-08
d
yr
n .2102195852547033 1.4955e-09 deg/d
Q 2.927377881491867 1.3884e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1602  
   data-arc span      12112 days (33.16 yr)  
   first obs. used      1986-11-30  
   last obs. used      2020-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51019  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:09:41  

Additional Information
 Earth MOID = 1.68315 au 
 Jupiter MOID = 2.26118 au 
 T_jup = 3.323 
[ 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 14.1   n/a MPO332983  
rotation period rot_per 5.30 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:
[Chang, C.-K.; Lin, H.-W.; Ip, W.-H.; Prince, T.A.; et al. (2016) Astrophys. J. Sup. Ser. 227, A20.]

17685 (1997 AJ19)          Discovered 1997-Jan-13 by Okuni, T. at Nanyo
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1997 AJ19 = 1986 WS8 = 1998 HB61 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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