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1172 Aneas (1930 UA)
Classification: Jupiter Trojan          SPK-ID: 2001172
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 61 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1039461319648538 5.7201e-08  
a 5.216907739966256 7.6024e-08 AU
q 4.674630359579257 3.0698e-07 AU
i 16.66751164411706 6.196e-06 deg
node 247.3350814000711 2.1191e-05 deg
peri 51.58402276412757 3.8246e-05 deg
M 138.2179841402752 3.304e-05 deg
tp 2455329.485512033056
(2010-May-12.98551203)
0.00040275 JED
period 4352.293367682029
11.92
9.5137e-05
2.605e-07
d
yr
n .08271501242843171 1.8081e-09 deg/d
Q 5.759185120353256 8.3927e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1138  
   data-arc span      30473 days (83.43 yr)  
   first obs. used      1930-10-17  
   last obs. used      2014-03-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55769  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 17:27:47  

Additional Information
 Earth MOID = 3.68935 AU 
 T_jup = 2.905 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.33 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 11
diameter diameter 142.82 km 4.8 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 11
rotation period rot_per 8.705 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Published Reference List:
[Mottola, S.; Di Martino, M.; Erikson, A.; Gonano-Beurer, M.; et al. (2011) Astron. J. 141, A170.]
[French, L.M.; Stephens, R.D.; Lederer, S.M.; Coley, D.R.; Rohl, D.A. (2011) Minor Planet Bul. 38, 116-120.]
geometric albedo albedo 0.0403   0.003 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 11
B-V BV .725 mag .038 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=6; phase (min.=2.69, mean=3.49, max.=4.87) deg.
U-B UB .254 mag .033 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=7; phase (min.=2.69, mean=4.41, max.=9.96) deg.
Tholen spectral type spec_T D   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

1172 Aneas (1930 UA)          Discovered 1930-Oct-17 by Reinmuth, K. at Heidelberg (024)
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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