IC 2157
DSS image of IC 2157
Overlaid DSS image of IC 2157, 30' x 30' with north at top and west to the right

Aladin viewer for the region around IC 2157
Trumpler 4, Tr 4, Collinder 80, Cr 80, Lund 204, C 0601+240, OCl 465

Type  Open Cluster
Magnitude  8.4
Size  5'
Right Ascension  6h 4' 49.8"  (2000)
Declination  24° 3' 12" N
Constellation  Gemini
Description  Cl, S, about 20 F stars
Classification  II 1 p
Observing Notes

Andrew Cooper
Dec 30, 2015    Waikoloa, HI (map)
28cm f/10 SCT, NexStar 11" Gypsy @ 233x
Seeing: 6 Transparency: 6 Moon: 0%

An indistinct cluster in heavy galactic starfield, an obvious asterism of six stars at the center matches the DSS image, bright, sparse, large at 10' in diameter, otherwise unremarkable (Archinal indicates this is probably an actual cluster and confirms the discovery description matches the modern coordinates)

Harold Corwin

Espin's position coincides almost exactly with the brightest star in his cluster, which he describes as "Jan. 11 [1900] Cl., triangular in shape, stars 9.5-14". I can make out at least two different triangular shapes on the DSS, so I am not quite sure which (if either) Espin meant. See also IC 2156 which may be a part of this.
IC Notes by Harold Corwin
Other Data Sources for IC 2157
Nearby objects for IC 2157
5 objects found within 60'
1 Geminorum 2 Geminorum IC 2156
NGC 2129 NGC 2158
Credits...

Drawings, descriptions, and CCD photos are copyright Andrew Cooper unless otherwise noted, no usage without permission.

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IC 2157