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JPL Small-Body Database Browser
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738 Alagasta (A913 AF)
Classification: Main-belt Asteroid          SPK-ID: 2000738
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.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05451970336344764 3.0647e-08  
a 3.036066203810441 1.0907e-08 au
q 2.870540774986907 9.2224e-08 au
i 3.534661530688243 3.7419e-06 deg
node 132.0977035094566 5.0618e-05 deg
peri 42.46305116118391 6.1276e-05 deg
M 332.0977705145815 3.4954e-05 deg
tp 2458750.262019782332
(2019-Sep-23.76201978)
0.00018778 TDB
period 1932.258751932879
5.29
1.0412e-05
2.851e-08
d
yr
n .186310451247735 1.004e-09 deg/d
Q 3.201591632633975 1.1502e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2890  
   data-arc span      38841 days (106.34 yr)  
   first obs. used      1913-01-07  
   last obs. used      2019-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46789  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:12:58  

Additional Information
 Earth MOID = 1.87697 au 
 Jupiter MOID = 1.76268 au 
 T_jup = 3.236 
[ 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 10.13   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 23
diameter diameter 62.79 km 1.2 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 23
rotation period rot_per 18.86 h n/a LCDB (Rev. 2019-January); 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:
[Garceran, A.C.; Aznar, A.; Mansego, E.A.; Rodriguez, P.B.; et al. (2016) Minor Planet Bull. 43, 92-97.]
geometric albedo albedo 0.0398   0.002 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 23
B-V BV 0.763   0.057 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=1.57 deg.
Tholen spectral type spec_T CGSU   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

738 Alagasta (A913 AF)          Discovered 1913-Jan-07 by Kaiser, F. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A913 AF = 1950 BX1 = A908 CA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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