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JPL Small-Body Database Browser
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221908 Agastrophus (2008 QQ)
Classification: Jupiter Trojan          SPK-ID: 2221908
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06497386957186516 6.7632e-08  
a 5.105185715337068 2.0007e-07 au
q 4.773482044528609 4.7355e-07 au
i 7.346696521980772 6.225e-06 deg
node 271.8222887039025 6.566e-05 deg
peri 141.7904431712913 0.00010164 deg
M 269.4738572431759 8.3437e-05 deg
tp 2459659.966575639319
(2022-Mar-21.46657564)
0.0010139 TDB
period 4213.235598193025
11.54
0.00024767
6.781e-07
d
yr
n .08544502001131792 5.0228e-09 deg/d
Q 5.436889386145528 2.1307e-07 au
  Orbit Determination Parameters
   # obs. used (total)      309  
   data-arc span      8005 days (21.92 yr)  
   first obs. used      1997-10-06  
   last obs. used      2019-09-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53734  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 04:07:01  

Additional Information
 Earth MOID = 3.78852 au 
 Jupiter MOID = .112193 au 
 T_jup = 2.980 
[ 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 12.7   n/a MPO454592  

221908 Agastrophus           Discovered 2008 Aug. 21 by P. Kocher at the Observatoire Naef.
In Homer's Iliad, Agastrophus was a Paionian hero, famed for his spear, who fought with the Trojans in the Trojan War and who was killed by Diomedes. Agastrophus was the son of Paeon and brother of Laophoon.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20111210/MPCPages.arcLast Updated: 2011-12-12
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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