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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1021397243434595 3.734e-08  
a 2.795981714360427 8.7772e-09 au
q 2.5104009127863 1.0438e-07 au
i 8.752209227859668 4.2422e-06 deg
node 91.94078256100752 2.8247e-05 deg
peri 291.9503552362092 3.5486e-05 deg
M 123.9037650872808 2.2125e-05 deg
tp 2458412.764504850300
0.00010439 TDB
period 1707.654146787602
n .2108155217947518 9.9269e-10 deg/d
Q 3.081562515934554 9.6737e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2309  
   data-arc span      46539 days (127.42 yr)  
   first obs. used      1892-11-27  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53426  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:04:06  

Additional Information
 Earth MOID = 1.53087 au 
 Jupiter MOID = 2.35957 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 7.3   n/a MPO502156 IRAS observations used: 12
diameter diameter 86.447 km 1.926 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 28.523 h n/a LCDB (Rev. 2019-August); 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] (  
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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
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 36 CATAB v2.0f-lin.ifort 2020-May-20 01:04:19 2020-May-20 01:04
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2020-Jun-01 03:28 UT
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