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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 161 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1725107544930107 2.8642e-08  
a 2.524746243534241 3.808e-09 au
q 2.089200364158754 7.1865e-08 au
i 2.350371425519886 2.983e-06 deg
node 181.0774319899101 7.9012e-05 deg
peri 177.3904286669242 7.9664e-05 deg
M 217.2808277862117 1.1813e-05 deg
tp 2459781.404641081715
(2022-Jul-20.90464108)
4.862e-05 TDB
period 1465.294869256629
4.01
3.3151e-06
9.076e-09
d
yr
n .2456843380490608 5.5584e-10 deg/d
Q 2.960292122909727 4.465e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3996  
   data-arc span      57266 days (156.79 yr)  
   first obs. used      1864-04-05  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48419  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:42:57  

Additional Information
 Earth MOID = 1.08378 au 
 Jupiter MOID = 2.4899 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 8.54   n/a E2021B10 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] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 21.040 h n/a LCDB (Rev. 2020-October); 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: http://www.minorplanet.info/call.html]
[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] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
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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