| Date & Time: | Apr 26 2025, from 25:19 to 27:39 JST(+0900) |
| Composed 15 shots with 8 minutes exposed |
| Optical: | BORG 67FL with conversion lens (f=210mm, F3.4) |
| with SIGHTRON Quad BP III filter |
| Auto-guided with TAKAHASHI JP Equatorial |
| CMOS Camera: | ZWO ASI2600MC Pro (Cooled temp.: -15°C) |
| Location: | Ooizumi, Hokuto city, Yamanashi pref. |
| G65.3+5.7 / Supernova Remnant |
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| R.A. | 19h 32m 00.0s (2000.0) |
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| Dec. | +31°12' 00" (2000.0) |
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| Apparent Size | 240' |
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| Real Size | 180 light yrs. |
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| Magnitude | - |
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| Distance | 2600 light yrs. |
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| Other IDs | Sh2-91, Sh2-94
Sh2-96 |
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This image captures a ring-shaped supernova remnant spreading about 3 degrees north of β Cygni (Albireo).
You can display an emphasized monochrome image by clicking on a button in upper right hand of this page.
With a diameter of up to 4 degrees, part of the remnant extends into the region of Lyra, but it is extremely faint, revealing a complex interplay of red Hα light and green OIII light.
The distance from the solar system is estimated to be 2600 light-years, with an actual diameter of approximately 180 light-years.
The filamentous region on the southern side is relatively dense, designated as Sh2-91 in the Sharpless catalog.
Based on the expansion speed of the nebula, this supernova remnant is believed to have been formed by a supernova explosion approximately 300,000 years ago.
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Objects around G65.3+5.7 |
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