Click on the image for FULL RES |
||||
| Name / Constellation | SH 101 |
Other: Tulip Nebula; Ced 173; LBN 168; Avedisova 935 | Cyg |
|
| Coordinates | AR: 19h 59m 55s - Dec: +35° 16′ 36″ | |||
| Optics | Astrophysics 130 EDFS f6 - Svbony 30/160mm guide scope + ZWO ASI 174 MM Mini | |||
| Camera-Mount | ZWO ASI 533 MC Pro - iOptron CEM40 Mount | |||
| Filters | Optolong L-Extreme | |||
|
||||
| Location / Date | Novara City (Italy) - May 2025 | |||
| Seeing | Bortle 7.6 | |||
| Note | ||||
| Acquisition | N.I.N.A. | |||
| Processing | Adobe Photoshop -  |
|||
| Comment |
The Tulip Nebula (also known as Sh2-101) is an emission nebula visible in the constellation Cygnus. It is located in the central-southern part of the constellation, at the center of a very bright and star-rich section of the Milky Way; it is located about 45 minutes northeast of the star η Cygni and extends for about 20 minutes in a NE-SW direction. It has an elongated and irregular shape; the best time to observe it in the evening sky is between June and November. This is a large H II region located in the initial stretch of the Orion Arm, approximately 2,700 parsecs (8,750 light-years) away from the Solar System, beyond the large nebula complex of Cygnus X, from which it is no more than 500 parsecs distant. This distance coincides with that estimated for the OB association Cygnus OB3, which contains about thirty massive stars of the first spectral classes with an age of approximately 8.3 million years. The source of the ionizing radiation in the nebula's gas is believed to be the star HD 227018, a blue giant of class O6.5III with an apparent magnitude of 9.01. According to the Avedisova catalogue, the nebula would host some active star formation phenomena, as evidenced by the presence of four sources of infrared radiation reported in the IRAS catalogue: IRAS 19581+3504, IRAS 19579+3509, IRAS 19584+3506 and IRAS 19584+3515, as well as some sources of radio waves.
|
|||
