|
NGC 1261
GCL-5, ESO155-SC011
RA 03:12:14
Dec -55°13.0'
Globular
cluster |
Dunlop 337: "a very bright round nebula,
about 1.5' diameter, pretty well defined and gradually bright to the centre. A
small star north following."
h: "bright; large; irregularly round;
2.5' diameter; all resolved into equal stars 14mag. Has a star 9th mag 45 N.f.
3' distant." His second observation recorded it as "pretty bright;
round; very gradually brighter in the middle; 3' across; resolved into stars of
15th magnitude. A very faint nebula (??) precedes."
Described in Union Obs. Circulars, 45-76, p
50. “Nebulae, clusters, etc. on Sydney Plates” as “Remarkable
object; looks like a nebula on plates, but the images are poor, resolved into
stars by h.
Hartung notes: “This well condensed
globular cluste rlies in a fine field; 30cm resolves it into crowded stars right
to the centre. It is about 2.5’ across and the scattered outliers do not
extend far; the stars are however very faint and hard to detect with 20cm
although the cluster looks granular. It is a fine bright object, conspicuous
with 10.5cm.”
ASV Journal, Vol 24, No 3, June 1971: "many
faint stars resolved in 12.5-inch 150x."
Van den Bergh and Hagen ("UBV photometry
of star clusters in the Magellanic Clouds", Astronomical Journal, Vol. 73,
1968) find that the integrated V magnitude through a 60'' diaphragm is 9.61.
They classify it as a globular cluster.
11x80: “Distinct
smallish globular cluster, lies just south-west of a Triangulum Australis of
stars. Close north-east is a 9th mag star, clearly separated, not touching as
shown in Uranometrias. On edge of the binocular field lies the prominently red
TW Hor.” (suburban skies, light and air pollution); “Part of a False
Cross asterism. About 1.5 arc min across, 8.5 magnitude round glow. Small star
off to the north-east. Look for the orange TW Hor due south. Rating: easy.”
(suburban skies, seeing average-good); “A small, 45 arcsec, pretty bright
cluster, like a softly focused small star. To the north-east, about 1 arcmin
away, is a 9th magnitude star.” (exurban skies, seeing good) [AS] |
