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JPL Small-Body Database Browser
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18428 (1994 AC1)
Classification: Main-belt Asteroid          SPK-ID: 2018428
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1926970381351811 3.3634e-08  
a 2.369049148001006 8.7939e-09 au
q 1.912540393984538 8.1752e-08 au
i 8.022518022305576 4.9264e-06 deg
node 301.0098618550535 2.8442e-05 deg
peri 105.0419281374868 3.3197e-05 deg
M 17.82313681072403 1.5609e-05 deg
tp 2458534.561179726020
(2019-Feb-20.06117973)
5.7578e-05 TDB
period 1331.862934719213
3.65
7.4158e-06
2.03e-08
d
yr
n .2702980844465773 1.505e-09 deg/d
Q 2.825557902017474 1.0488e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1109  
   data-arc span      9465 days (25.91 yr)  
   first obs. used      1994-01-07  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51379  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:28:25  

Additional Information
 Earth MOID = .940456 au 
 Jupiter MOID = 2.6006 au 
 T_jup = 3.508 
[ 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 15.3   n/a MPO358808  

18428 (1994 AC1)          Discovered 1994-Jan-07 by Kobayashi, T. at Oizumi
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1994 AC1 = 1996 NK3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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