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2378 Pannekoek (1935 CY)
Classification: Main-belt Asteroid          SPK-ID: 2002378
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .143680572330736 4.1278e-08  
a 2.888208678860232 1.911e-08 AU
q 2.473229202870995 1.2034e-07 AU
i 14.24693143140776 5.3149e-06 deg
node 181.1805711586687 1.8759e-05 deg
peri 265.1902463153947 2.5625e-05 deg
M 145.4484068795257 1.7185e-05 deg
tp 2456276.151195246538
(2012-Dec-14.65119525)
8.5296e-05 JED
period 1792.838954415208
4.91
1.7793e-05
4.871e-08
d
yr
n .2007988498428325 1.9929e-09 deg/d
Q 3.303188154849468 2.1855e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1363  
   data-arc span      35318 days (96.70 yr)  
   first obs. used      1918-09-16  
   last obs. used      2015-05-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5045  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 15:39:04  

Additional Information
 Earth MOID = 1.5379 AU 
 T_jup = 3.231 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.9 mag n/a MPO265970  
diameter diameter 32.26 km 2.5 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 3
rotation period rot_per 11.8806 h n/a LCDB (Rev. 2015-May); 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]
geometric albedo albedo 0.0891   0.016 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 3
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 | Physical Parameters | Discovery Circumstances ]
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