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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1402088729955674 3.023e-08  
a 2.894523525138313 1.3753e-08 au
q 2.488685643819514 8.5986e-08 au
i 14.24654495888858 3.8367e-06 deg
node 180.9248297349634 1.3691e-05 deg
peri 265.8496515207704 1.9277e-05 deg
M 226.3471730161319 1.5526e-05 deg
tp 2459868.289676317233
(2022-Oct-15.78967632)
7.9719e-05 TDB
period 1798.72202406329
4.92
1.2819e-05
3.51e-08
d
yr
n .2001420982141335 1.4264e-09 deg/d
Q 3.300361406457113 1.5681e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2718  
   data-arc span      37337 days (102.22 yr)  
   first obs. used      1918-09-16  
   last obs. used      2020-12-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42723  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 13:42:35  

Additional Information
 Earth MOID = 1.55333 au 
 Jupiter MOID = 2.06146 au 
 T_jup = 3.229 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456619.5 (2013-Nov-23.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1439479570725461 3.0442e-08  
q 2.471939468539828 8.7052e-08 au
tp 2456276.103437132900
(2012-Dec-14.60343713)
6.8831e-05 TDB
node 181.1853072685148 1.3708e-05 deg
peri 265.1217978442114 1.8962e-05 deg
i 14.24863853259467 3.8385e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2718  
   data-arc span      37337 days (102.22 yr)  
   first obs. used      1918-09-16  
   last obs. used      2020-12-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42723  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 13:42:35  

Additional Information
 Jupiter MOID = 2.06146 au 
 T_jup = 3.229 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.267274730798041E-16 -2.627382683657736E-15 4.59928591583667E-14 1.430112371185046E-15 5.822134381006992E-16 -7.07811898786158E-16
q -2.627382683657736E-15 7.578119631615124E-15 1.19273721851433E-14 -3.27794015207396E-15 2.815429682857678E-14 2.521095152412781E-15
tp 4.59928591583667E-14 1.19273721851433E-14 4.73766480279132E-9 1.721011555493196E-11 9.151900332016439E-10 -7.478065609156096E-13
node 1.430112371185046E-15 -3.27794015207396E-15 1.721011555493196E-11 1.878997753734467E-10 -1.784730906099402E-10 1.205692985683725E-12
peri 5.822134381006992E-16 2.815429682857678E-14 9.151900332016439E-10 -1.784730906099402E-10 3.595505402173621E-10 -1.285067100501112E-12
i -7.07811898786158E-16 2.521095152412781E-15 -7.478065609156096E-13 1.205692985683725E-12 -1.285067100501112E-12 1.473444192708222E-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 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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