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109 Felicitas (A869 TA)
Classification: Main-belt Asteroid          SPK-ID: 2000109
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 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2991395195228356 1.1321e-08  
a 2.694472548224681 8.0884e-09 au
q 1.888449324781279 3.1861e-08 au
i 7.844852346220773 4.448e-07 deg
node 2.768344615367822 1.9467e-06 deg
peri 57.607280635652 2.7265e-06 deg
M 340.9781109711786 1.7464e-06 deg
tp 2459085.861141629305
8.1621e-06 TDB
period 1615.507846775287
n .2228401432519164 1.0034e-09 deg/d
Q 3.500495771668083 1.0508e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2117  
   data-arc span      8865 days (24.27 yr)  
   first obs. used      1996-05-28  
   last obs. used      2020-09-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .3597  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2020-Sep-16 11:03:01  

Additional Information
 Earth MOID = .914008 au 
 Jupiter MOID = 1.94682 au 
 T_jup = 3.292 
[ 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 9.0   n/a MPO492749 IRAS observations used: 15
magnitude slope G 0.04   n/a PDS3 (MPC 17257) Fit
diameter diameter 82.588 km 0.616 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 13.191 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Harris, A.W.; Young, J.W. (1989) Icarus 81, 314-364.]
geometric albedo albedo 0.036   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
B-V BV 0.696   0.010 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=8.46, mean=12.89, max.=24.09) deg.
U-B UB 0.408   0.019 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=8.46, mean=15.54, max.=26.17) deg.
Tholen spectral type spec_T GC   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B Ch   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)

109 Felicitas (A869 TA)          Discovered 1869-Oct-09 by Peters, C. H. F. at Clinton
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A869 TA = A911 HA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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