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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1023510316319252 2.5957e-08  
a 2.795410970353762 7.8546e-09 au
q 2.509297773702853 7.0534e-08 au
i 8.752142993089439 2.3977e-07 deg
node 91.9368135667002 4.1753e-06 deg
peri 291.9048565473761 1.1459e-05 deg
M 166.1182379942657 1.2382e-05 deg
tp 2458412.762102053415
(2018-Oct-21.26210205)
5.6839e-05 TDB
period 1707.131298073122
4.67
7.1951e-06
1.97e-08
d
yr
n .2108800889576216 8.888e-10 deg/d
Q 3.08152416700467 8.6585e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2620  
   data-arc span      46867 days (128.31 yr)  
   first obs. used      1892-11-27  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50827  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:15:53  

Additional Information
 Earth MOID = 1.52854 au 
 Jupiter MOID = 2.3608 au 
 T_jup = 3.303 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457348.5 (2015-Nov-22.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .100008654083586 2.5837e-08  
q 2.519092139086236 7.0015e-08 au
tp 2456703.570357435682
(2014-Feb-15.07035744)
5.4309e-05 TDB
node 92.03797078399604 4.178e-06 deg
peri 291.8733827880036 1.1655e-05 deg
i 8.74886741796066 2.3974e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2620  
   data-arc span      46867 days (128.31 yr)  
   first obs. used      1892-11-27  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50827  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:15:53  

Additional Information
 Jupiter MOID = 2.3608 au 
 T_jup = 3.303 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.67552318698918E-16 -1.800780536886424E-15 5.576448694163584E-13 2.687970231313219E-14 5.054498003380529E-14 2.696403073969796E-16
q -1.800780536886424E-15 4.902098168204528E-15 -1.387665875779984E-12 -7.606605575498097E-14 -1.092705159767208E-13 -7.402817953925498E-16
tp 5.576448694163584E-13 -1.387665875779984E-12 2.949421506048503E-9 -6.307487272477917E-11 5.865504023127788E-10 2.724587030179421E-14
node 2.687970231313219E-14 -7.606605575498097E-14 -6.307487272477917E-11 1.745543332674904E-11 -2.936327099622455E-11 1.186733808607359E-13
peri 5.054498003380529E-14 -1.092705159767208E-13 5.865504023127788E-10 -2.936327099622455E-11 1.358274690038294E-10 -1.129499268954046E-13
i 2.696403073969796E-16 -7.402817953925498E-16 2.724587030179421E-14 1.186733808607359E-13 -1.129499268954046E-13 5.747350537473715E-14

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.33   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
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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