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JPL Small-Body Database Browser
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125 Liberatrix (A872 RA)
Classification: Main-belt Asteroid          SPK-ID: 2000125
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 80 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07794181328302086 3.4675e-08  
a 2.74365351830158 9.029e-09 au
q 2.529808188064815 9.5654e-08 au
i 4.664196776377901 4.1563e-06 deg
node 168.9812265250378 4.5965e-05 deg
peri 110.0107041744845 5.3404e-05 deg
M 250.8239060044116 2.8377e-05 deg
tp 2459503.904828814752
0.00013149 TDB
period 1659.939751834624
n .2168753411695306 1.0706e-09 deg/d
Q 2.957498848538345 9.7327e-09 au
  Orbit Determination Parameters
   # obs. used (total)      4343  
   data-arc span      53900 days (147.57 yr)  
   first obs. used      1872-10-01  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .38078  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 00:59:14  

Additional Information
 Earth MOID = 1.51826 au 
 Jupiter MOID = 2.13541 au 
 T_jup = 3.340 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.8   n/a MPO502154 IRAS observations used: 11
magnitude slope G 0.33   n/a PDS3 (MPC 17257) Fit
diameter diameter 48.418 km 0.533 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 3.968 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Tedesco, E.F. (1979) PhD Dissertation, New. Mex. State Univ. 280pp.]
[Zappala, V.; Debehogne, H.; Lagerkvist, C.-I.; Rickman, H. (1982) Astron. Astrophys. Suppl. Ser. 50, 23-26.]
[Lagerkvist, C.-I.; Hahn, G.; Magnusson, P.; Rickman, H.; Hammarback, G. (1986) in Asteroids, Comets, Meteors II. C.-I. Lagerkvist, B.A. Lindblad, M. Lundstedt, H. Rickman, Uppsala, eds. pp. 67-72.]
[Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R.; Greenberg, R.; et al. (1987) Icarus 70, 191-245.]
[Drummond, J.D.; Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R. (1988) Icarus 76, 19-77.]
[Magnusson, P. (1990) Icarus 85, 229-240.]
[Drummond, J.D.; Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R. (1991) Icarus 89, 44-64.]
[Harris, A.W.; Young, J.W.; Dockweiler, T.; Gibson, J.; et al. (1992) Icarus 95, 115-147.]
[De Angelis, G. (1995) Planet. Space Sci. 43, 649-682.]
[Trigo-Rodriquez, J.M.; Caso, A.S. (2003) Minor Planet Bull. 30, 26-27.]
[Fauerbach, M.; Bennett, T. (2005) Minor Planet Bull. 32, 80-81.]
[Buchheim, R.K. (2006) Minor Planet Bull. 33, 63.]
[Durech, J.; Kaasalainen, M.; Marciniak, A.; et al. (2007) Astron. Astrophys. 465, 331-337.]
[Benishek, V.; Protitch-Benishek, V. (2008) Minor Planet Bull. 35, 28-30.]
[Proyecto ECLA (Silvia Alonso Perez) (2011)]
geometric albedo albedo 0.182   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
B-V BV 0.705   0.029 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=7; phase (min.=6.93, mean=13.48, max.=19.47) deg.
U-B UB 0.239   0.045 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=2.09, mean=6.87, max.=11.33) deg.
Tholen spectral type spec_T M   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B X   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)

125 Liberatrix (A872 RA)          Discovered 1872-Sep-11 by Henry, Prosper at Paris
In their cooperative program it will probably never be known which of the Henry brothers discovered which planet. With strict impartiality, these discoveries were announced as having been made alternatively by Prosper and by Paul.
Note: "planet" implies "minor planet"
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A872 RA = 1943 FE = 1949 OE1 = 1949 SM = 1954 TD1 = A902 EG 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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