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

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 69 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4831759072090573 4.6584e-08  
a 1.063298465858416 2.675e-10 AU
q .549538264983277 4.9483e-08 AU
i 8.886372665667212 7.7022e-06 deg
node 325.5963147252617 1.2042e-05 deg
peri 121.3573965191144 1.2495e-05 deg
M 327.6374099353361 5.0136e-06 deg
tp 2457036.501614654071
(2015-Jan-14.00161465)
5.5777e-06 JED
period 400.4803462753991
1.10
1.5113e-07
4.138e-10
d
yr
n .8989205171942148 3.3922e-10 deg/d
Q 1.577058666733555 3.9675e-10 AU
  Orbit Determination Parameters
   # obs. used (total)      252  
   # delay obs. used      8  
   # Doppler obs. used      7  
   data-arc span      9467 days (25.92 yr)  
   first obs. used      1989-08-01  
   last obs. used      2015-07-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .60846  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 11:49:41  

Additional Information
 Earth MOID = .0206069 AU 
 T_jup = 5.676 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.9 mag 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. 2015-May); 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.]

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

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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