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JPL Small-Body Database Browser
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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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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1019181421727486 3.8224e-08  
a 2.796472879915928 8.8744e-09 au
q 2.511461559358421 1.0717e-07 au
i 8.752262182845653 4.3011e-06 deg
node 91.94146227025563 2.8617e-05 deg
peri 292.0678544971606 3.5851e-05 deg
M 39.49622653553733 2.2092e-05 deg
tp 2458413.100922299435
(2018-Oct-21.60092230)
0.00010465 TDB
period 1708.104137783942
4.68
8.1308e-06
2.226e-08
d
yr
n .2107599835611056 1.0032e-09 deg/d
Q 3.081484200473436 9.7788e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2177  
   data-arc span      46358 days (126.92 yr)  
   first obs. used      1892-11-27  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54098  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 01:52:21  

Additional Information
 Earth MOID = 1.53123 au 
 Jupiter MOID = 2.35836 au 
 T_jup = 3.302 
[ 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 7.13   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 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. 2019-January); 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.]
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

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2135-Nov-10 05:45 00:09 Vesta 0.0254605874020068 0.0254575774372001 0.0254635978619786 1.92616151818229 1.92615909194238 2501165.739872249 9.23040382275151 232.509586636476 34.7293781923248 51.2671893044502 84637.7784471585 T 33 CATAB v2.0f-lin.ifort 2019-Nov-07 01:52:30 2019-Nov-07 01:52
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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