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15998 (1999 AG2)
Classification: Main-belt Asteroid          SPK-ID: 2015998
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04418999116692729 3.5151e-08  
a 2.207115599059118 7.5987e-09 au
q 2.109583180232308 7.9105e-08 au
i 4.257743547286014 5.042e-06 deg
node 24.8674092563391 4.54e-05 deg
peri 237.0370121574138 7.4922e-05 deg
M 47.80175146379322 6.0724e-05 deg
tp 2458841.470623609841
(2019-Dec-23.97062361)
0.00020197 TDB
period 1197.666900214335
3.28
6.185e-06
1.693e-08
d
yr
n .3005844111877636 1.5523e-09 deg/d
Q 2.304648017885928 7.9345e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1952  
   data-arc span      11079 days (30.33 yr)  
   first obs. used      1989-01-10  
   last obs. used      2019-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47025  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:22:52  

Additional Information
 Earth MOID = 1.0979 au 
 Jupiter MOID = 2.70148 au 
 T_jup = 3.655 
[ 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 MPO384892  
diameter diameter 7.005 km 0.051 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.074   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

15998 (1999 AG2)          Discovered 1999-Jan-09 by Kobayashi, T. at Oizumi
Reference: 20000726/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 AG2 = 1989 AO8 = 1993 HY6 = 1996 HS21 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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