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JPL Small-Body Database Browser
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46 Hestia (A857 QA)
Classification: Main-belt Asteroid          SPK-ID: 2000046
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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.

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 157 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1723017513087348 2.889e-08  
a 2.525194782216176 3.8516e-09 au
q 2.090099298844649 7.2552e-08 au
i 2.350036609083438 3.0059e-06 deg
node 181.0771721316141 8.1015e-05 deg
peri 177.3830309855 8.1676e-05 deg
M 168.1565817319323 1.189e-05 deg
tp 2458315.875996970654
4.7856e-05 TDB
period 1465.685366294299
n .2456188812952332 5.6195e-10 deg/d
Q 2.960290265587702 4.5152e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3786  
   data-arc span      57001 days (156.06 yr)  
   first obs. used      1864-04-05  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49585  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 00:57:14  

Additional Information
 Earth MOID = 1.08634 au 
 Jupiter MOID = 2.48908 au 
 T_jup = 3.432 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.5   n/a MPO502153 IRAS observations used: 8
magnitude slope G 0.06   n/a PDS3 (MPC 17257) Fit
diameter diameter 131.471 km 22.151 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 21.040 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Scaltriti, F.; Zappala, V.; Harris, A.W. (1981) Icarus 46, 275-280.]
[Pilcher, F. (2012) Minor Planet Bull. 39, 171-173.]
[Pilcher, F. (2017) Minor Planet Bull. 44, 294-297.]
[Pilcher, F. (2018) Posting on CALL web site:]
[Franco, L.; Pilcher, F. (2019) Minor Planet Bull. 46, 140-142.]
geometric albedo albedo 0.046   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
B-V BV 0.692   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=6; phase (min.=5.29, mean=10.53, max.=19.03) deg.
U-B UB 0.226   0.040 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=7; phase (min.=5.29, mean=11.62, max.=19.03) 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
SMASSII spectral type spec_B Xc   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)

46 Hestia (A857 QA)          Discovered 1857-Aug-16 by Pogson, N. R. at Oxford
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A857 QA = 1935 EY 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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