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27 Euterpe (A853 VA)
Classification: Main-belt Asteroid          SPK-ID: 2000027
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 113 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1730554904621514 2.8399e-08  
a 2.346136448118068 2.705e-09 au
q 1.940124654397866 6.6346e-08 au
i 1.583710566268726 2.9319e-06 deg
node 94.78702699066091 9.8298e-05 deg
peri 356.3514962048147 9.863e-05 deg
M 139.9535081457404 9.4343e-06 deg
tp 2458690.218744936104
3.4053e-05 TDB
period 1312.587688989586
n .2742673903006996 4.7432e-10 deg/d
Q 2.752148241838271 3.1731e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2936  
   data-arc span      60912 days (166.77 yr)  
   first obs. used      1853-11-10  
   last obs. used      2020-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53256  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 19:03:07  

Additional Information
 Earth MOID = .956467 au 
 Jupiter MOID = 2.43433 au 
 T_jup = 3.540 
[ 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 7.08   n/a E2021B10  
diameter diameter 96 km n/a Dunham occult. list: Dunham 1997; 124x75 km Yeomans E-mail 2001-Apr-04
rotation period rot_per 10.4082 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Stephens, R.D.; Malcolm, G.; Koff, R.A.; Brincat, S.M.; Warner, B. (2001) Minor Planet Bull. 28, 1-2.]
[Stephens, R.D. (2001) Minor Planet Bull. 28, 5-6.]
[Gandolfi, D.; Cigna, M.; Fulvio, D.; Blanco, C. (2009) Planet. Space Sci. 57, 1-9.]
[Stephens, R.D. (2009) Posting on CALL web site.]
[Behrend, R. (2010) Observatoire de Geneve web site,]
[Pilcher, F. (2011) Minor Planet Bull. 38, 50-52.]
[Stephens, R.D.; Warner, B.D.; Megna, R.; Coley, D. (2012) Minor Planet Bull. 39, 2-5.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
[Behrend, R. (2018) Observatoire de Geneve web site,]
[Behrend, R. (2020) Observatoire de Geneve web site,]
geometric albedo albedo 0.215   0.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
B-V BV 0.878   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=7; phase (min.=5.92, mean=16.62, max.=26.21) deg.
U-B UB 0.502   0.017 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=6; phase (min.=14.71, mean=18.41, max.=26.21) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

27 Euterpe (A853 VA)          Discovered 1853-Nov-08 by Hind, J. R. at London
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A853 VA = 1945 KB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
FirstGov 2021-Apr-10 11:43 UT
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