Deep Sky Object in Summer
M16 (Eagle Nebula in Serpens)
Click on image to enlarge
| Date & Time: | Jun 7 2024, from 25:04 to 25:39 JST(+0900) |
| Composed 5 shots with 8 minutes exposed |
| Optical: | TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3) |
| with LPS-D1 Light-pollution suppression filter |
| Auto-guided with TAKAHASHI EM-200 Equatorial & Lacerta M-GEN |
| CMOS Camera: | ZWO ASI2600MC Pro (Cooled temp.: -15°C) |
| Location: | Koumi town, Nagano pref. |
| Camera Settings: | Recording format...16bit FITS, converted to 16bit TIFF(6248×4176) |
| Device Size...23.5×15.7mm, Gain...100 |
Click on image to enlarge
Close-up of central M16
| Date & Time: | Aug 10 2024, from 22:46 to 23:41 JST(+0900) |
| Composed 10 shots with 6 minutes exposed |
| Optical: | Meade 25cm(10") Schmidt-Cassegrain with conversion lens (f=1600mm, F6.3) |
| with IDAS LPS-P1 Light-pollution suppression filter |
| Auto-guided with Meade LX200 Equatorial & Lacerta M-GEN |
| Digital Camera: | Nikon D810A |
| Location: | Ooizumi, Hokuto city, Yamanashi pref. |
| Camera Settings: | Recording Format...14bit CCD-RAW, converted to 16bit TIFF(4080×4080) |
| Device Size...20×20mm |
| Sensitivity...ISO4000, White Balance...Daylight |
| M16 (NGC6611) / Diffused Nebula & Open Cluster, type II 3 m n |
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| R.A. | 18h 18m 48.0s (2000.0) |
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| Dec. | -13° 47' 00" (2000.0) |
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| Apparent Size | 35×28' |
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| Real Size | 46×37 light yrs. |
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| # of Stars | 543 |
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| Magnitude | 6.4 |
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| Distance | 4600 light yrs. |
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| Other IDs | IC 4703 |
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M16 (NGC6611) is a magnificent diffused nebula in the constellation of Serpens, with a size of 30 arc minutes and a distance of about 4600 light years.
The nebula is lying on top of an open cluster. Strictly the number of M16=NGC6611 is the cluster's one, the nebula has other number IC4703.
The nebula has a nickname "Eagle Nebula", very luminous with dark streaks of dust; a nursery of baby stars.
As shown in the second image, the dark streaks, which look like elephant's nose, are now very popular by a very clear photograph taken by the Hubble Space Telescope (HST) in 1995.
This image barely captured the gaseous pillars like the HST's one.
⇒ Display the spectral profile of M16 (in new window)
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