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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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1619073702215439 4.4776e-08  
a 2.858752778571452 1.5596e-08 au
q 2.395899634079417 1.3016e-07 au
i 13.87330601221546 5.2548e-06 deg
node 345.514228563545 1.7026e-05 deg
peri 42.60308588358836 2.2358e-05 deg
M 221.2942762466543 1.7534e-05 deg
tp 2459680.729102364385
(2022-Apr-11.22910236)
8.9215e-05 TDB
period 1765.482131700942
4.83
1.4447e-05
3.955e-08
d
yr
n .2039103050299129 1.6686e-09 deg/d
Q 3.321605923063487 1.8121e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1741  
   data-arc span      15196 days (41.60 yr)  
   first obs. used      1978-11-08  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43015  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 16:09:40  

Additional Information
 Earth MOID = 1.41734 au 
 Jupiter MOID = 2.23162 au 
 T_jup = 3.240 
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Orbital Elements at Epoch 2456726.5 (2014-Mar-10.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1622276131128332 4.4665e-08  
q 2.394940632102392 1.2975e-07 au
tp 2456153.301442689805
(2012-Aug-13.80144269)
7.573e-05 TDB
node 345.5374970573449 1.7029e-05 deg
peri 43.20579681261786 2.2355e-05 deg
i 13.87272142096469 5.2544e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1741  
   data-arc span      15196 days (41.60 yr)  
   first obs. used      1978-11-08  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43015  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 16:09:40  

Additional Information
 Jupiter MOID = 2.23162 au 
 T_jup = 3.240 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.994978206020971E-15 -5.76578625698283E-15 -3.094913155705251E-13 -4.036844346017239E-15 -1.085066757144041E-13 4.451933246817426E-16
q -5.76578625698283E-15 1.68341844937635E-14 1.181056187278146E-12 1.224452424429693E-14 3.761276112639094E-13 -1.352643154223282E-16
tp -3.094913155705251E-13 1.181056187278146E-12 5.735071480297983E-9 8.994807063949164E-12 1.110963673262125E-9 2.23605768629793E-13
node -4.036844346017239E-15 1.224452424429693E-14 8.994807063949164E-12 2.89984902200133E-10 -2.791425385921815E-10 1.028096497978689E-11
peri -1.085066757144041E-13 3.761276112639094E-13 1.110963673262125E-9 -2.791425385921815E-10 4.997601982708305E-10 -9.840698430596732E-12
i 4.451933246817426E-16 -1.352643154223282E-16 2.23605768629793E-13 1.028096497978689E-11 -9.840698430596732E-12 2.760862556396036E-11

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] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
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] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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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