Deep Sky Object in Autumn
IC348, IC1985 & its vicinity (Reflection Nebula & Open Cluster in Perseus)
Click on image to enlarge
| Date & Time: | Nov 23 2025, from 22:38 to 24:41 JST(+0900) |
| Mosaic of 2 flames of 8min.×8shots |
| Optical: | TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3) |
| with IDAS LPS-D1 light-pollution suppression filter |
| Auto-guided with TAKAHASHI JP Equatorial+SBIG STV |
| CMOS Camera: | ZWO ASI2600MC Pro (Cooled temp.: -20°C) |
| Location: | Ooizumi, Hokuto city, Yamanashi pref. |
| Camera Settings: | Recording format...16bit FITS, converted to 16bit TIFF(6248×4176) |
| Device Size...23.5×15.7mm, Gain...100 |
Objects around IC348, IC1985 |
At the southernmost end of Perseus, the small reflection nebula IC1985 lies just south of the 4th-magnitude star ο Persei, visible at the upper left of the frame,
and the small open cluster overlapping it is IC348.
Its apparent diameter is about 10 arcminutes, and its position is roughly midway between the California Nebula and the Pleiades.
Very faint molecular clouds extend throughout this region in addition to these objects.
About 1 degree west of omicron Per lies LBN 749, which emits faint Hα light and is intricately intermixed with the dark nebula B2.
It spans about 2.5 degrees from east to west, but long exposures are required to capture it.
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| IC348 / Open Cluster, type III 2 p n |
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| R.A. | 03h 44m 34.0s (2000.0) |
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| Dec. | +32° 10' 00" (2000.0) |
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| Apparent Size | 8.0' |
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| Real Size | N/A |
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| # of stars | 21 |
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| Magnitude | 7.3 |
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| Distance | N/A |
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| IC1985 / Reflection Nebula, type 2 R |
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| R.A. | 03h 44m 30.0s (2000.0) |
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| Dec. | +32° 17' 00" (2000.0) |
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| Apparent Size | 10.0' |
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| Real Size | 3 light yrs. |
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| Magnitude | 7.0 |
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| Distance | 1040 light yrs. |
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| Other IDs | vdB19, LBN758 |
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|
| LBN 749 / Diffused Nebula, type 6 E |
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| R.A. | 03h 39m 00.0s (2000.0) |
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| Dec. | +32°12' 00" (2000.0) |
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| Apparent Size | 150×60' |
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| Real Size | 44×18 light yrs. |
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| Magnitude | - |
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| Distance | 1000 light yrs. |
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Click on image to enlarge
Wide-field around IC348 & IC1985
| Date & Time: | Nov 4 2016, from 24:02 to 25:02 JST(+0900) |
| Mosaic of 2 flames of 3min.×10shots |
| Optical: | BORG 60ED with a conversion lens (f=245mm, F4.1) |
| with BaaderPlanetarium Moon&Skyglow filter |
| Auto-guided with TAKAHASHI EM-200 Equatorial |
| Digital Camera: | Canon EOS 6D (Remodeled) |
| Location: | Ooizumi, Hokuto city, Yamanashi pref. |
| Camera Settings: | Recording Format...14bit CCD-RAW, converted to 16bit TIFF(5472×3648) |
| Device Size...35×24mm, Sensitivity...ISO3200 |
| IC348 / Open Cluster, type III 2 p n |
|---|
| R.A. | 03h 44m 34.0s (2000.0) |
|---|
| Dec. | +32° 10' 00" (2000.0) |
|---|
| Apparent Size | 8.0' |
|---|
| Real Size | N/A |
|---|
| # of stars | 21 |
|---|
| Magnitude | 7.3 |
|---|
| Distance | N/A |
|---|
|
| IC1985 / Reflection Nebula, type 2 R |
|---|
| R.A. | 03h 44m 30.0s (2000.0) |
|---|
| Dec. | +32° 17' 00" (2000.0) |
|---|
| Apparent Size | 10.0' |
|---|
| Real Size | 3 light yrs. |
|---|
| Magnitude | 7.0 |
|---|
| Distance | 1040 light yrs. |
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| Other IDs | vdB19, LBN758 |
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This is a wide-field image that includes the first image in this page.
At the southernmost end of Perseus, the 4th-magnitude star ο Persei appears just west of ζ Persei at the left edge of the frame,
and immediately to its south lies the small reflection nebula IC1985 with the small open cluster IC348 superimposed on it.
In the southern part of the field, an extended molecular cloud with very few stars is visible, along with several dark nebulae.
These interstellar gas clouds are the same material that forms IC1985 and related objects, and they shine by reflecting the light of nearby stars.
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Nebulae around IC348 |
