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560 Delila (A905 EC)
Classification: Main-belt Asteroid          SPK-ID: 2000560
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

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 two-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 is not working, here are some notes that might help.
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 77 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1606282995469029 3.2343e-08  
a 2.751128142042418 8.1028e-09 au
q 2.309219106750514 8.8136e-08 au
i 8.469483243014885 3.6675e-06 deg
node 105.3350753950503 2.262e-05 deg
peri 3.925840534388772 2.5291e-05 deg
M 129.9595954855347 1.2195e-05 deg
tp 2458398.813169208835
(2018-Oct-07.31316921)
5.4916e-05 TDB
period 1666.72771083632
4.56
7.3634e-06
2.016e-08
d
yr
n .2159920889653664 9.5423e-10 deg/d
Q 3.193037177334322 9.4043e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2893  
   data-arc span      42146 days (115.39 yr)  
   first obs. used      1905-03-14  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39304  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:18:09  

Additional Information
 Earth MOID = 1.32604 au 
 Jupiter MOID = 1.93617 au 
 T_jup = 3.311 
[ 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 11.1   n/a MPO473769  
diameter diameter 35.334 km 0.276 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 29.913 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pilcher, F.; Strabla, L.P.; Quadri, U.; Gireli, R. (2014) Minor Planet Bull. 41, 132.]
geometric albedo albedo 0.062   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
SMASSII spectral type spec_B B   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

560 Delila (A905 EC)          Discovered 1905-Mar-13 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1902-Nov-20 00:37 00:01 Jupiter 1.96462420633295 1.96462371234301 1.96462470032456 2.72013312884207 2.55672640369089 2416073.525394172 1.42625840816279 106.625847595707 7.01790444194408 80.7503536441677 4038253.83262992 T 77 CATAB v2.0f-lin.ifort 2020-Aug-24 22:18:24 2020-Aug-24 22:18
1962-Mar-30 20:38 < 00:01 Jupiter 1.96612406424318 1.96612368930415 1.96612443918255 2.70029898299307 2.5357440817854 2437754.359496120 0.672272250834661 58.6364857900755 6.49171006319754 77.9791739944226 3950428.03551845 T 77 CATAB v2.0f-lin.ifort 2020-Aug-24 22:18:24 2020-Aug-24 22:18
2021-Aug-09 08:50 < 00:01 Jupiter 1.96776884525126 1.96776855731649 1.96776913318614 2.67987775167217 2.5141297512728 2459435.868341120 0.191319585336405 36.3408042903539 7.24088494527128 76.9835593654649 3941617.20342945 T 77 CATAB v2.0f-lin.ifort 2020-Aug-24 22:18:24 2020-Aug-24 22:18
2080-Dec-19 16:40 < 00:01 Jupiter 1.96948658056692 1.96948629251503 1.96948686861903 2.65886085649218 2.49186587682333 2481118.194782214 0.898689891013689 69.4967301468261 7.90103226935239 82.6210409384933 4136664.47738344 T 77 CATAB v2.0f-lin.ifort 2020-Aug-24 22:18:24 2020-Aug-24 22:18
2140-May-02 23:36 00:02 Jupiter 1.97147079000394 1.97147039578932 1.97147118422014 2.63805227877794 2.46982590940879 2502801.483037393 1.67051442520466 117.38156813537 7.6793383422056 82.7800712069732 4134351.83451679 T 77 CATAB v2.0f-lin.ifort 2020-Aug-24 22:18:24 2020-Aug-24 22:18
2199-Sep-15 07:39 00:02 Jupiter 1.97388469257672 1.97388412769278 1.97388525746491 2.6181152802473 2.44873409093895 2524485.818420768 2.45300863000215 167.192001440735 7.50474686841003 82.5357905483897 4110993.34231394 T 77 CATAB v2.0f-lin.ifort 2020-Aug-24 22:18:24 2020-Aug-24 22:18

Alternate Designations
 A905 EC = 1957 OS 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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