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2378 Pannekoek (1935 CY)
Classification: Main-belt Asteroid          SPK-ID: 2002378
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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1397256492040917 2.946e-08  
a 2.893036058184865 1.4014e-08 au
q 2.488804716784138 8.3913e-08 au
i 14.26888782520679 3.8211e-06 deg
node 180.8393982209862 1.3498e-05 deg
peri 266.268207116762 1.9242e-05 deg
M 265.1512163773289 1.5686e-05 deg
tp 2459870.041953878175
(2022-Oct-17.54195388)
7.9774e-05 TDB
period 1797.335684075083
4.92
1.3059e-05
3.575e-08
d
yr
n .2002964739362295 1.4553e-09 deg/d
Q 3.297267399585591 1.5972e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2803  
   data-arc span      37550 days (102.81 yr)  
   first obs. used      1918-09-16  
   last obs. used      2021-07-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42417  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 13:23:59  

Additional Information
 Earth MOID = 1.55401 au 
 Jupiter MOID = 2.06065 au 
 T_jup = 3.230 
[ 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 11.07   n/a E2021B10  
diameter diameter 40.373 km 0.706 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 11.874 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:
[Oey, J. (2011) http://minorplanet.haoeydental.com.au]
[Stephens, R.D.; Warner, B.D. (2019) Minor Planet Bull. 46, 449-456.]
geometric albedo albedo 0.057   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
SMASSII spectral type spec_B Cgh   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

2378 Pannekoek (1935 CY)          Discovered 1935-Feb-13 by Van Gent, H. at Johannesburg (LS)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1935 CY = 1935 EP = 1938 UD1 = 1960 HD = 1967 RB1 = 1970 GP1 = 1970 JG = 1972 RH3 = 1975 JH = 1977 RR5 = 1977 XJ = A918 RE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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