ब्राह्मस्फुटसिद्धान्त (ब्रह्मगुप्त - शून्य, कुट्टक, बीजगणित एवं सम्पूर्ण २१ अध्याय सान्वय सटीक)

sting. The Hindu asterism probably includes all the stars in the
Scorpion’s tail (ε, μ, ζ, η, θ, ι, κ, λ, υ and ν Scorpionis).
20. Pūrva-Āṣāḍha, the twentieth nakṣatra, is figured as an
elephant’s tooth or as a couch, and it consists of two stars, of
which the most southern one is placed in 5½°, 5⅓° or 5° S and
254° or 255° E. This corresponds well with δ Sagittarii, and
which also corresponds with the twentieth lunar mansion of
Arabs called Nāaim. The Arabian mansion consists of four,
or according to some eight, stars. The Indian nakṣatra corres-
ponds to δ and ε Sagittarii.
21. Uttara-Āṣāḍha, the twenty-first nakṣatra, is represented
by a couch or by an elephant’s tooth. The principal or the
most northerly star is placed in 5° S and 260° or 261° E, agreeing
with a star in the body of Sagittarius (τ Sagittarii), and the
other star is perhaps the one marked ζ. The Arabian lunar
mansion corresponding to it is Baldah, consisting of six stars,
two, of which are placed by Mohammad of Tīzīn in declination
21° and 16°. One of these must be a star in the head of Sagit-
tarius. Some authors, on the contrary, describe the lunar
mansion as destitute of stars. Here the Arabs and Hindus do
not show reconciliation.
22. Abhijit, the twenty-second asterism, consists of three
stars figuring as a triangle or as a nut of floating Trapa (in
modern Indian astronomy, it does not occupy an equal portion
of the ecliptic with other nakṣatras). Its brightest star is very
remote from the zodiac, being in 60° or 62° N. The longitude
of its circle of declination is 265°, 266° 40′ or 268° according to
different authorities. The corresponding lunar mansion of
Arabs is Zābih, consisting of two stars (according to some, four)
in the horns of Capricorn. This totally disagrees with Indian
asterism.
23. Śravaṇa, the twenty-third nakṣatra, is represented by
three footsteps, and contains three stars of which the middlemost
is placed in 30° N (all authorities agree), and longitude 280°
(Sūrya-Siddhānta) or 278° (Brahmagupta and Śiromaṇi), or 275°
(Grahalāghava). The assigned latitude indicates the bright
star in the Eagle, whence the three may be inferred to be α, β