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1173 Anchises (1930 UB)
Classification: Jupiter Trojan          SPK-ID: 2001173
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 57 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1392358408327514 2.0174e-08  
a 5.28525474255536 5.5524e-08 au
q 4.549357854460377 1.2627e-07 au
i 6.922029814023391 1.3185e-06 deg
node 283.9234040924036 7.2422e-06 deg
peri 40.88180249641789 1.141e-05 deg
M 281.0070796331635 1.2303e-05 deg
tp 2460370.329626856040
(2024-Feb-29.82962686)
0.00016143 TDB
period 4438.102351959092
12.15
6.9936e-05
1.915e-07
d
yr
n .08111574980714152 1.2782e-09 deg/d
Q 6.021151630650342 6.3255e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3037  
   data-arc span      33169 days (90.81 yr)  
   first obs. used      1930-10-17  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43777  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 07:24:22  

Additional Information
 Earth MOID = 3.54044 au 
 Jupiter MOID = .484905 au 
 T_jup = 2.966 
[ 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 8.90   n/a MPO614063 IRAS observations used: 8
diameter diameter 99.549 km 0.846 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 11.595 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[French, L.M. (1987) Icarus 72, 325-341.]
[Stephens, R.D.; Coley, D.R.; French, L.M. (2016) Minor Planet Bull. 43, 265-270.]
[Stephens, R.D. (2017) Minor Planet Bull. 44, 123-125.]
[Stephens, R.D.; Warner, B.D. (2018) Minor Planet Bull. 45, 124-128.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.050   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
B-V BV 0.691   0.045 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=1.24, mean=5.53, max.=8.11) deg.
U-B UB 0.266   0.080 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=1.24, mean=5.53, max.=8.11) deg.
Tholen spectral type spec_T P   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

1173 Anchises (1930 UB)          Discovered 1930-Oct-17 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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