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4471 Graculus (1978 VB)
Classification: Main-belt Asteroid          SPK-ID: 2004471
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet 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. For accurate long-term ephemerides, please instead use our Horizons system.

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Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1619073707714045 4.4391e-08  
a 2.858752778685636 1.5568e-08 au
q 2.395899632603198 1.2918e-07 au
i 13.87330614688218 5.1538e-06 deg
node 345.5142285506286 1.7025e-05 deg
peri 42.60308571545561 2.2303e-05 deg
M 221.2942763517386 1.7512e-05 deg
tp 2459680.729101889794
8.9127e-05 TDB
period 1765.482131806717
n .2039103050176961 1.6657e-09 deg/d
Q 3.321605924768074 1.8089e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1795  
   data-arc span      15247 days (41.74 yr)  
   first obs. used      1978-11-08  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42594  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 23:15:54  

Additional Information
 Earth MOID = 1.41734 au 
 Jupiter MOID = 2.23162 au 
 T_jup = 3.240 
[ 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 12.1   n/a MPO296171  
diameter diameter 11.701 km 0.163 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 11.85 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
geometric albedo albedo 0.204   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

4471 Graculus           Discovered 1978 Nov. 8 by P. Wild at Zimmerwald.
Pyrrhocorax graculus is the Alpine species of choughs. In great flocks they are sometimes a bit of a nuisance, but to watch their masterly elegant flight, especially in turbulent air, is a great delight.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990402/MPCPages.arcLast Updated: 2010-06-11

Alternate Designations
 1978 VB = 1980 DV2 = 1985 DB4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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