Current Info for Observer
as of 04/18/2024 8:04 a.m.
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General Info
| Type | Open Cluster |
| Constellation | Cassiopeia |
| Right ascension | 1h33'21.800'' |
| Declination | +60°42'29'' |
| Magnitude | 7.400 |
| Distance | 8,000ly |
| Size | 6 arc min |
| Catalog Designations | NGC581, M103 |
| Discovered | 1781 Pierre Mechain |
Generate a finder chart
The following form will generate a PDF finder chart suitable for printing using to locate objects in the sky with your telescope!
The Date is only really useful for solar system objects, as deep space objects move measurably only on a galactic timescale.
The larger the F.O.V (field of view), the more "zoomed out" the object will appear. It can be helpful to print several charts of the same object with different field of views.
Limiting the magnitude (remember, lower magnitude means brighter!) of stars and objects can make sure your chart is not cluttered with dim objects that you may not be visible to you anyway. The defaults are good, but try experimenting with raising and lowering the values.
Tyler (4830)
10" Dobsonian
20 points
mnastro (4583)
XX12i
20 points
A classic open cluster in cas. With below average seeing and the wind moving the scope from time to time it wasn't the best view I've had of M103 but still worth the peek.
HamilTiller (5560)
Celestron 127eq
20 points
Took a peek at M103 in Cassiopeia. Very pretty, dozens of stars easily visible in my eyepiece.
bllape (1611)
Orion XT8
20 points
variety of colors. Christmas tree cluster. very brights spread out stars.
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