Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
546 Herodias (A904 TD)
Classification: Main-belt Asteroid          SPK-ID: 2000546
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ hide orbit diagram ]

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.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1150967316942251 4.1298e-08  
a 2.598422751348895 9.0717e-09 au
q 2.299352785108721 1.0774e-07 au
i 14.84936225793661 5.2061e-06 deg
node 21.76690179690083 1.6498e-05 deg
peri 108.8901637043491 2.7857e-05 deg
M 118.8446915722456 2.1075e-05 deg
tp 2458495.442959822639
(2019-Jan-11.94295982)
8.9495e-05 TDB
period 1529.900343536347
4.19
8.0118e-06
2.194e-08
d
yr
n .2353094445144473 1.2323e-09 deg/d
Q 2.897492717589069 1.0116e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2217  
   data-arc span      41847 days (114.57 yr)  
   first obs. used      1904-10-13  
   last obs. used      2019-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41131  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:09:22  

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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Feb-18 13:02 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin