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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05429165133315998 2.8519e-08  
a 3.035553405993032 9.8633e-09 au
q 2.870748198871672 8.4298e-08 au
i 3.534832347273288 3.3778e-06 deg
node 132.0989776071283 4.9885e-05 deg
peri 42.68753455970342 5.9505e-05 deg
M 46.43274465357004 3.2126e-05 deg
tp 2458751.340701847217
(2019-Sep-24.84070185)
0.0001723 TDB
period 1931.769228897077
5.29
9.4152e-06
2.578e-08
d
yr
n .1863576635422121 9.0829e-10 deg/d
Q 3.200358613114392 1.0399e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3209  
   data-arc span      39192 days (107.30 yr)  
   first obs. used      1913-01-07  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45156  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:11:42  

Additional Information
 Earth MOID = 1.87667 au 
 Jupiter MOID = 1.76242 au 
 T_jup = 3.237 
[ 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 10.0   n/a MPO473772 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-August); 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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