IC 405 (also known as the Flaming Star Nebula, SH 2-229, or Caldwell 31) is an emission and reflection nebula[1] in the constellation Auriga, surrounding the bluish star AE Aurigae. It shines at magnitude +6.0. Its celestial coordinates are RA 05h 16.2m dec +34° 28′.[2] It surrounds the irregular variable star AE Aurigae and is located near the emission nebula IC 410, the open clusters M38 and M36, and the K-class star Iota Aurigae. The nebula measures approximately 37.0′ x 19.0′, and lies about 1,500 light-years away from Earth.[2] It is believed that the proper motion of the central star can be traced back to the Orion’s Belt area.[2] The nebula is about 5 light-years across.[1]
（quote from Wikipedia）
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| Date and Place | 2018-Dec-31, 2019-Jan-01, 2019-Jan-02 Yachiyo, Chiba, Japan |
| Scope | Takahashi FSQ-85ED + QE.73 reducer + BetaSGR Focuser |
| Mount | Celestron CGEM |
| Camera | Moravian G3-16200(Enhanced Cooler model) : -30[deg-c] |
| Auto guiding | QHY mini guide scope FL=130 + QHY-5L2M |
| Filter | Astrodon Ha 5[nm, S2 5[nm], O3 5[nm] Filter |
| Exposure | S2 : 15×900[s], Ha : 25×900[s], O3 : 17×900[s] Total : 855[min] |
| Software | Astroart7 with SHS Version 7.0.1 PHD Guiding 2.6.5 Pixinsight 1.8.6 Photoshop CC 2019 |
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