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546 Herodias (A904 TD)
Classification: Main-belt Asteroid          SPK-ID: 2000546
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1150967351979038 3.8978e-08  
a 2.598422752799757 8.569e-09 au
q 2.299352777288555 1.0092e-07 au
i 14.84936168156913 4.8823e-06 deg
node 21.76690208953931 1.6061e-05 deg
peri 108.8901533428054 2.6123e-05 deg
M 118.8447016377387 1.9935e-05 deg
tp 2458495.442916624073
(2019-Jan-11.94291662)
8.4477e-05 TDB
period 1529.900344817706
4.19
7.5679e-06
2.072e-08
d
yr
n .2353094443173654 1.164e-09 deg/d
Q 2.897492728310958 9.5552e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2506  
   data-arc span      42365 days (115.99 yr)  
   first obs. used      1904-10-13  
   last obs. used      2020-10-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39237  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:28:26  

Additional Information
 Earth MOID = 1.35851 au 
 Jupiter MOID = 2.1974 au 
 T_jup = 3.360 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.9   n/a MPO473768 IRAS observations used: 32
diameter diameter 65.945 km 1.505 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 10.77 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Szekely, P.; Kiss, L.L.; Szabo, Gy.M.; Sarneczky, K.; et al. (2005) Planet. Space Sci. 53, 925-936.]
[Warner, B.D. (2010) Minor Planet Bull. 37, 57-64.]
geometric albedo albedo 0.054   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.766   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=17.01, mean=17.19, max.=17.59) deg.
U-B UB 0.375   0.035 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=17.01, mean=17.19, max.=17.59) deg.
Tholen spectral type spec_T TDG   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices; used ground-based radiometric albedo

546 Herodias (A904 TD)          Discovered 1904-Oct-10 by Gotz, P. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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