Cluster • alf Per

Name
Alpha Persei Cluster
Alternate Names
Alpha Per
Alf Per
Melotte 20

Cluster Data

Parameter Value Error Unit Reference
dist_mean 172.4 2.7 pc vl2009
plx_mean 5.91 0.03 mas gc2017
rv_mean -1.0 km/s dezeeuw1999
pm_ra_mean 23.06 0.06 mas/yr gc2017
pm_dec_mean -25.36 0.07 mas/yr gc2017

Non Fiducial Data

dist_mean (pc)
Value Error Ref.
177.0 4.0 dezeeuw1999
172.4 2.7 vl2009
186.6 4.4 francis2012
190.5 6.9 robichon1999
plx_mean (mas)
Value Error Ref.
5.91 0.03 gc2017
5.8 0.09 vl2009
5.25 0.19 robichon1999
rv_mean (km/s)
Value Error Ref.
4.53 2.18 madsen2002
-1.0 dezeeuw1999
-0.2 0.5 robichon1999
rv_disp (km/s)
Value Error Ref.
0.71 madsen2002
pm_ra_mean (mas/yr)
Value Error Ref.
23.06 0.06 gc2017
22.73 0.17 vl2009
22.93 0.15 robichon1999
pm_dec_mean (mas/yr)
Value Error Ref.
-25.36 0.07 gc2017
-26.51 0.17 vl2009
-25.56 0.17 robichon1999
cl_notes ([char])
Value Error Ref.
astrometric rv for perob3 madsen2002
need to translate pms from u_l*cosb=33.5\pm0.1 and mu_b = -8.7\pm0.1 dezeeuw1999