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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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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 89 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4832130534500551 4.1569e-08  
a 1.063180454705304 3.3222e-10 au
q .5494377808187361 4.406e-08 au
i 8.885505892348467 7.6662e-06 deg
node 325.5403740364774 1.3244e-05 deg
peri 121.4100756688546 1.3505e-05 deg
M 145.3860902093294 3.8834e-06 deg
tp 2459038.792836365268
(2020-Jul-08.29283637)		 4.3298e-06 TDB
period 400.4136766088491
1.10		 1.8768e-07
5.138e-10		 d
yr
n .8990701892325025 4.214e-10 deg/d
Q 1.576923128591872 4.9275e-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 = .0200989 au 
 Jupiter MOID = 3.66542 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. 2020-October); 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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