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17492 Hippasos (1991 XG1)
Classification: Jupiter Trojan          SPK-ID: 2017492
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06933715544075134 5.9796e-08  
a 5.160031203294749 1.0598e-07 au
q 4.802249317672774 3.6914e-07 au
i 29.19738187367897 4.9498e-06 deg
node 89.00568848722986 9.952e-06 deg
peri 216.5558015066035 4.6813e-05 deg
M 311.7931631688431 4.8374e-05 deg
tp 2459573.801467410230
(2021-Dec-25.30146741)
0.00057521 TDB
period 4281.312399536871
11.72
0.0001319
3.611e-07
d
yr
n .0840863656758481 2.5906e-09 deg/d
Q 5.517813088916724 1.1333e-07 au
  Orbit Determination Parameters
   # obs. used (total)      2061  
   data-arc span      15615 days (42.75 yr)  
   first obs. used      1977-09-15  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43107  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 18:11:00  

Additional Information
 Earth MOID = 3.81669 au 
 Jupiter MOID = .300789 au 
 T_jup = 2.743 
[ 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 10.1   n/a MPO452418  
diameter diameter 53.975 km 0.781 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 17.699 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Stephens, R.D.; French, L.M.; Davitt, C.; Coley, D.R. (2014) Minor Planet Bull. 41, 95-100.]
[Stephens, R.D.; Warner, B.D. (2019) Minor Planet Bull. 46-4, submitted. (Trojans Gaggle) http://www.planetarysciences.org/lightcurves.html]
geometric albedo albedo 0.066   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

17492 Hippasos           Discovered 1991 Dec. 10 by F. Borngen at Tautenburg.
Hippasos was one of Priam's many sons. He supported Aeneas in the Trojan war.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010309/MPCPages.arcLast Updated: 2009-05-11

Alternate Designations
 1991 XG1 = 1989 UA10 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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