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3097 Tacitus (2011 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2003097
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.

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09023450166857344 2.4504e-08  
a 2.928688737815043 1.0853e-08 au
q 2.664419969015939 7.1441e-08 au
i 7.461722772300126 3.4073e-06 deg
node 196.6662222569544 2.1838e-05 deg
peri 86.72257292502181 3.0859e-05 deg
M 39.38983160533248 2.0391e-05 deg
tp 2458800.195882894636
0.00010371 TDB
period 1830.662361810381
n .1966501346780235 1.0931e-09 deg/d
Q 3.192957506614146 1.1833e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2954  
   data-arc span      24681 days (67.57 yr)  
   first obs. used      1953-04-15  
   last obs. used      2020-11-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45446  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:10:20  

Additional Information
 Earth MOID = 1.66175 au 
 Jupiter MOID = 1.9394 au 
 T_jup = 3.258 
[ 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 12.3   n/a MPO435727  
diameter diameter 20.810 km 0.170 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 8.7759 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.]
geometric albedo albedo 0.054   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

3097 Tacitus (2011 P-L)          Discovered 1960-Sep-24 by PLS at Palomar
These planets have all been discovered as a result of the Palomar survey of faint minor planets and subsequently identified with planets observed at other oppositions. In Sept. and Oct. 1960, T. Gehrels exposed 130 plates with the 122 cm Schmidt camera at Palomar. In the following years C. J. van Houten and I. van Houten-Groeneveld measured these plates astrometrically and photometrically at Leiden. P. Herget, Cincinnati, computed the orbits of the planets found on the NORC computer, Dahlgren, Virginia, USA.
Note: "planet" implies "minor planet"
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 2011 P-L = 1965 SX = 1975 TL = 1979 MH9 = 1980 RW2 = 1980 TR6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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