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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06793545812574064 6.0549e-08  
a 5.149481642460509 1.1322e-07 au
q 4.799649247969863 3.7976e-07 au
i 29.20123212825112 4.9762e-06 deg
node 89.00350808233897 1.1493e-05 deg
peri 217.8207876670003 6.106e-05 deg
M 276.7526735271132 6.5385e-05 deg
tp 2459587.487136071431
(2022-Jan-07.98713607)
0.00078284 TDB
period 4268.189550825272
11.69
0.00014077
3.854e-07
d
yr
n .08434489511610198 2.7817e-09 deg/d
Q 5.499314036951155 1.2091e-07 au
  Orbit Determination Parameters
   # obs. used (total)      1835  
   data-arc span      15329 days (41.97 yr)  
   first obs. used      1977-09-15  
   last obs. used      2019-09-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45384  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 01:24:19  

Additional Information
 Earth MOID = 3.81532 au 
 Jupiter MOID = .280568 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 17.75 h n/a LCDB (Rev. 2019-January); 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.]
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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