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1388 Aphrodite (1935 SS)
Classification: Main-belt Asteroid          SPK-ID: 2001388
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09315548238544323 4.266e-08  
a 3.017603499533346 1.8793e-08 AU
q 2.736497189886315 1.2894e-07 AU
i 11.17960549706846 6.5612e-06 deg
node 54.48498362226803 2.6368e-05 deg
peri 256.2892693380595 4.3812e-05 deg
M 95.33206647928385 3.678e-05 deg
tp 2456493.476375718891
0.00019391 JED
period 1914.660108420744
n .1880229281514285 1.7565e-09 deg/d
Q 3.298709809180376 2.0544e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1440  
   data-arc span      28998 days (79.39 yr)  
   first obs. used      1935-09-28  
   last obs. used      2015-02-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53217  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 13:35:25  

Additional Information
 Earth MOID = 1.75056 AU 
 T_jup = 3.212 
[ 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 10.9 mag n/a MPO265964  
diameter diameter 25.22 km 2.8 IRAS-A-FPA-3-RDR-IMPS-V5.0 IRAS observations used: 2
rotation period rot_per 11.9432 h n/a LCDB (Rev. 2015-Feb); Warner et al., 2009 Published Reference List:
[Ivarsen, K.; Willis, S.; Ingleby, L.; Matthews, D.; Simet, M. (2004) Minor Planet Bul. 31, 29-33.]
[Behrend, R. (2006) Observatoire de Geneve web site,]
[Oey, J.; Krajewski, R. (2008) Minor Planet Bul. 35, 47-48.]
geometric albedo albedo 0.1317   0.035 EAR-A-5-DDR-ALBEDOS-V1.0:IMPS IMPS quality code 1: at least two valid IRAS band observations used
B-V BV .860 mag .030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=1; phase=15.04 deg.
U-B UB .490 mag .040 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=1; phase=15.04 deg.

1388 Aphrodite (1935 SS)          Discovered 1935-Sep-24 by Delporte, E. at Uccle
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1935 SS = A914 TC 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2015-Mar-27 20:54 UT
(server date/time)  
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