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346 Hermentaria (A892 WC)
Classification: Main-belt Asteroid          SPK-ID: 2000346
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1023510718450721 3.6972e-08  
a 2.795410950210142 8.6241e-09 au
q 2.509297643208682 1.0317e-07 au
i 8.752142986313117 4.1269e-06 deg
node 91.93682179422272 2.8133e-05 deg
peri 291.9048740651716 3.5166e-05 deg
M 166.1182280704079 2.1972e-05 deg
tp 2458412.762157627272
(2018-Oct-21.26215763)
0.00010335 TDB
period 1707.131279620842
4.67
7.8999e-06
2.163e-08
d
yr
n .2108800912370119 9.7587e-10 deg/d
Q 3.081524257211602 9.5067e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2533  
   data-arc span      46805 days (128.15 yr)  
   first obs. used      1892-11-27  
   last obs. used      2021-01-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51391  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:45:49  

Additional Information
 Earth MOID = 1.52854 au 
 Jupiter MOID = 2.3608 au 
 T_jup = 3.303 
[ 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 7.33   n/a E2021B10 IRAS observations used: 12
diameter diameter 86.447 km 1.926 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 28.523 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Harris, A.W.; Young, J.W. (1989) Icarus 81, 314-364.]
[Bembrick, C.S.; Pereghy, B.; Ainsworth, A.; Bolt, G. (2004) Minor Planet Bull. 31, 52-53.]
[Pilcher, F. (2016) Minor Planet Bull. 43, 222-224.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.332   0.071 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.843   0.026 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=4.82, mean=11.55, max.=17.85) deg.
U-B UB 0.485   0.019 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=4.82, mean=11.55, max.=17.85) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
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)

346 Hermentaria (A892 WC)          Discovered 1892-Nov-25 by Charlois, A. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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