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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1616370974287416 2.4462e-08  
a 2.860194449967903 1.4249e-08 au
q 2.397880920993296 7.602e-08 au
i 13.87350015284362 6.6176e-07 deg
node 345.4945758786524 4.901e-06 deg
peri 42.45279560333247 7.8527e-06 deg
M 262.2389545615634 8.9776e-06 deg
tp 2459680.294320405489
(2022-Apr-10.79432041)
4.6126e-05 TDB
period 1766.817801214568
4.84
1.3203e-05
3.615e-08
d
yr
n .2037561540032731 1.5226e-09 deg/d
Q 3.322507978942511 1.6552e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1845  
   data-arc span      15279 days (41.83 yr)  
   first obs. used      1978-11-08  
   last obs. used      2020-09-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42203  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:23:12  

Additional Information
 Earth MOID = 1.41783 au 
 Jupiter MOID = 2.23109 au 
 T_jup = 3.240 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457186.5 (2015-Jun-13.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1622590518329964 2.4417e-08  
q 2.39449030841303 7.5973e-08 au
tp 2457917.566288823204
(2017-Jun-13.06628882)
3.9737e-05 TDB
node 345.5358384736751 4.903e-06 deg
peri 43.06232651462231 7.8684e-06 deg
i 13.87372656051356 6.6204e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      1845  
   data-arc span      15279 days (41.83 yr)  
   first obs. used      1978-11-08  
   last obs. used      2020-09-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42203  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:23:12  

Additional Information
 Jupiter MOID = 2.23109 au 
 T_jup = 3.240 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.961937243681037E-16 -1.835931170522498E-15 -6.888995818795085E-13 -1.729491431389175E-14 -5.70023644867408E-14 -4.561191240473754E-16
q -1.835931170522498E-15 5.771940092269101E-15 2.14355533387422E-12 4.962877084792156E-14 1.74621525210232E-13 9.214280456953742E-16
tp -6.888995818795085E-13 2.14355533387422E-12 1.579002464914919E-9 -1.802135046139735E-11 2.326025498156799E-10 -4.891500511966905E-12
node -1.729491431389175E-14 4.962877084792156E-14 -1.802135046139735E-11 2.403937838315515E-11 -2.724100714432692E-11 1.701511871463785E-12
peri -5.70023644867408E-14 1.74621525210232E-13 2.326025498156799E-10 -2.724100714432692E-11 6.191115206980007E-11 -2.487980878917517E-12
i -4.561191240473754E-16 9.214280456953742E-16 -4.891500511966905E-12 1.701511871463785E-12 -2.487980878917517E-12 4.382972167602234E-13

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.16   n/a E2021B10  
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. 2020-October); 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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