Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics

Significant website upgrade scheduled for September 27. More details available here.

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

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 91 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0779926680438509 2.0527e-08  
a 2.742887871278637 7.7498e-09 au
q 2.528962728052498 5.889e-08 au
i 4.6647763613789 2.036e-06 deg
node 168.9834613922224 9.1996e-06 deg
peri 110.2604101348916 1.4982e-05 deg
M 336.4893712430808 1.8726e-05 deg
tp 2459504.860812083224
8.64e-05 TDB
period 1659.244963343651
n .2169661550603963 9.1953e-10 deg/d
Q 2.956813014504777 8.3542e-09 au
  Orbit Determination Parameters
   # obs. used (total)      4934  
   data-arc span      54367 days (148.85 yr)  
   first obs. used      1872-10-01  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .36525  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 06:14:16  

Additional Information
 Earth MOID = 1.51717 au 
 Jupiter MOID = 2.13458 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 8.85   n/a MPO636062 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. 2020-October); 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)]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
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 ]
FirstGov 2021-Sep-22 01:08 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin