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185570 (2008 AA78)
Classification: Main-belt Asteroid          SPK-ID: 2185570
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06204827457226293 5.1865e-08  
a 3.180477947346063 3.7217e-08 au
q 2.983134778398107 1.6026e-07 au
i 1.960147297301756 7.2837e-06 deg
node 4.291244194600297 0.00015651 deg
peri 103.1211161808222 0.00016742 deg
M 79.1118170348312 6.1773e-05 deg
tp 2458545.222834731215
(2019-Mar-02.72283473)
0.0003527 TDB
period 2071.748389050411
5.67
3.6365e-05
9.956e-08
d
yr
n .1737662748539684 3.0501e-09 deg/d
Q 3.377821116294019 3.9527e-08 au
  Orbit Determination Parameters
   # obs. used (total)      302  
   data-arc span      8485 days (23.23 yr)  
   first obs. used      1997-02-03  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52901  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 04:50:09  

Additional Information
 Earth MOID = 2.00074 au 
 Jupiter MOID = 1.69542 au 
 T_jup = 3.196 
[ 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 15.8   n/a MPO422723  
rotation period rot_per 9.14 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.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]

185570 (2008 AA78)          Discovered 2008-Jan-12 by Spacewatch at Kitt Peak
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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