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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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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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1619073736195334 4.6103e-08  
a 2.858752779212777 1.5705e-08 au
q 2.395899624902895 1.3354e-07 au
i 13.87330721667334 5.5534e-06 deg
node 345.5142280305802 1.7046e-05 deg
peri 42.60308527509712 2.2575e-05 deg
M 221.2942769044432 1.7615e-05 deg
tp 2459680.729099367413
8.9537e-05 TDB
period 1765.482132295037
n .2039103049612959 1.6803e-09 deg/d
Q 3.32160593352266 1.8248e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1675  
   data-arc span      15147 days (41.47 yr)  
   first obs. used      1978-11-08  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43663  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:08:29  

Additional Information
 Earth MOID = 1.41734 au 
 Jupiter MOID = 2.23162 au 
 T_jup = 3.240 
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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 ]
FirstGov 2020-Jun-02 03:19 UT
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