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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1438277512932523 4.1433e-08  
a 2.887765551906969 1.9215e-08 AU
q 2.472424726314073 1.2089e-07 AU
i 14.24804433001484 5.3368e-06 deg
node 181.1849389897537 1.8878e-05 deg
peri 265.1466589625211 2.5747e-05 deg
M 105.3184587790469 1.7178e-05 deg
tp 2456276.123381952075
(2012-Dec-14.62338195)
8.5416e-05 JED
period 1792.426367473675
4.91
1.789e-05
4.898e-08
d
yr
n .2008450704211632 2.0047e-09 deg/d
Q 3.303106377499866 2.1979e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1307  
   data-arc span      34988 days (95.79 yr)  
   first obs. used      1918-09-16  
   last obs. used      2014-07-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51023  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:02:38  

Additional Information
 Earth MOID = 1.53672 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 Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) 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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