Tau Serpentis
# Tau Serpentis

The Bayer designation Tau Serpentis (τ Ser / τ Serpentis) is shared by a collection of eight stars, $τ^1$ Serpentis through $τ^8$ Serpentis, in the head of the constellation Serpens. They are distributed within a box of size 40 minutes in right ascension by 3.5° in declination. They are numbered by increasing right ascension:

* $Tau^1$ Serpentis, also designated 9 Serpentis or HD 137471.
* $Tau^2$ Serpentis, also designated 12 Serpentis or HD 138527.
* $Tau^3$ Serpentis, also designated 15 Serpentis or HD 139074.
* $Tau^4$ Serpentis, also designated 17 Serpentis or HD 139216.
* $Tau^5$ Serpentis, also designated 18 Serpentis or HD 139225.
* $Tau^6$ Serpentis, also designated 19 Serpentis or HD 140027.
* $Tau^7$ Serpentis, also designated 22 Serpentis or HD 140232.
* $Tau^8$ Serpentis, also designated 26 Serpentis or HD 140729.
