Press Release
Free Access

Table 2

Positions of α Cen A and B in the ICRS coordinate frame.

Date Band MJDa Star RA Dec σ [″] b Instrument

1991-04-02 Hp 48 348.250 α Cen A 14:39:40.8985 60:50:06.530 0.001 Hipparcosc
2000-03-12 K s 51 615.383 α Cen A 14:39:36.394 60:50:03.31 0.20 2MASSd
2009-02-25 J s 54 887.356 α Cen A 14:39:31.813 60:50:00.01 0.07 SOFI

1991-04-02 H p 48 348.250 α Cen B 14:39:39.3908 60:50:22.097 0.046 Hipparcosc
2000-03-12 K s 51 615.383 α Cen B 14:39:35.103 60:50:13.56 0.20 2MASSd
2009-02-25 Js 54 887.356 α Cen B 14:39:30.919 60:50:03.48 0.07 SOFI



MJD is the average modified julian date of the measurement.


σ is the estimated position uncertainty in arcseconds.


Positions taken from the original Hipparcos catalog (ESA 1997).


The listed 2MASS coordinates are measured from the Atlas image in the Ks band.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.