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4769 Castalia (1989 PB)
Classification: Apollo [NEO, PHA]          SPK-ID: 2004769
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 89 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4832323083363309 4.1578e-08  
a 1.063147864469693 3.3014e-10 au
q .5494004678191624 4.407e-08 au
i 8.885519032246105 7.6662e-06 deg
node 325.541301786002 1.3244e-05 deg
peri 121.4098270048962 1.3505e-05 deg
M 325.5663099445063 3.895e-06 deg
tp 2459038.797462432509
(2020-Jul-08.29746243)
4.3294e-06 TDB
period 400.3952656100381
1.10
1.865e-07
5.106e-10
d
yr
n .8991115303311785 4.188e-10 deg/d
Q 1.576895261120223 4.8967e-10 au
  Orbit Determination Parameters
   # obs. used (total)      313  
   # delay obs. used      8  
   # Doppler obs. used      7  
   data-arc span      9817 days (26.88 yr)  
   first obs. used      1989-08-01  
   last obs. used      2016-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46642  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-06 09:46:21  

Additional Information
 Earth MOID = .0205439 au 
 Jupiter MOID = 3.66525 au 
 T_jup = 5.676 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.9   n/a PDS3 (MPC 17949)  
diameter diameter 1.4 km n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543 based on assumed medium albedo (0.15)
rotation period rot_per 4.095 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Ostro, S.J.; Chandler, J.F.; Hine, A.A.; Rosema, K.D.; et al. (1990) Science 248, 1523-1528.]
[Hudson, R.S.; Ostro, S.J.; Harris, A.W. (1997) Icarus 130, 165-176.]
geometric albedo albedo 0.092   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  

4769 Castalia (1989 PB)          Discovered 1989-Aug-09 by Helin, E. F. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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