Regulus & Leo I Dwarf Galaxy
Regulus is not really a single star, but a multiple star system. It consists of two pairs of stars. Regulus A, the primary component in the Regulus system, is a spectroscopic binary star composed of a blue-white main sequence star with the spectral classification B7 V and a companion believed to be a white dwarf. With a visual magnitude of 1.35, Regulus A is reponsible for the star system’s brightness and bluish colour. The system lies approximately 79 light years from the Sun.
Leo I is a dwarf spheroidal galaxy in the constellation Leo. At about 820,000 light-years distant, it is a member of the Local Group of galaxies and is thought to be one of the most distant satellites of the Milky Way galaxy.
Leo I is located only 12 arc minutes from Regulus. For that reason, the galaxy is sometimes called the „Regulus Dwarf“. Scattered light from the star makes studying the galaxy more difficult, and it was not until the 1990s that it was detected visually. Typical to a dwarf galaxy, the metallicity of Leo I is very low, only one percent that of the Sun. The galaxy may be embedded in a cloud of ionized gas with a mass similar to that of the whole galaxy.
Leo I is a dwarf spheroidal galaxy in the constellation Leo. At about 820,000 light-years distant, it is a member of the Local Group of galaxies and is thought to be one of the most distant satellites of the Milky Way galaxy.
Leo I is located only 12 arc minutes from Regulus. For that reason, the galaxy is sometimes called the „Regulus Dwarf“. Scattered light from the star makes studying the galaxy more difficult, and it was not until the 1990s that it was detected visually. Typical to a dwarf galaxy, the metallicity of Leo I is very low, only one percent that of the Sun. The galaxy may be embedded in a cloud of ionized gas with a mass similar to that of the whole galaxy.
Awarded APOD 
on NASA Website
on NASA WebsiteAwarded Astronomical Picture of the Day (APOD) on Astronomia.com
Awarded Astronomical Picture of the Day (APOD) on Apod GrAG
Awarded Top Pick
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Awarded Astronomical Picture of the Day (APOD) on Apod GrAG
Awarded Top Pick
on AstrobinImage Details
| Date |
April 10, 2024 |
| LOCATion |
Hannover (Germany) |
| Sky Quality |
Bortle 5 |
| Telescope |
Skywatcher 200/1000 @750mm f/3.75 |
| Mount |
Skywatcher EQ6-R Pro |
| Main Camera |
ZWO ASI 2600 MC Pro Gain 100, Offset 18, -10° |
| Focuser |
ZWO EAF |
| Filter |
Baader UV/IR Cut |
| Exposure |
RGB: 180 × 60″ (3h) Total: 3h |
| Guiding |
ZWO ASI 120MM, PHD2 |
| Calibration |
Flats, Darks, Darkflats |
| Software |
N.I.N.A., EQMod |
| Other |
Starizona Nexus Reducer & Corrector |
| Processing | Astropixelprocessor, Photoshop, Pixinsight |
Gallery
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NGC 6914
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IC 447
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Interstellar Shells
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Orion Nebula
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Regulus & Dwarf Galaxy
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Sh2-140
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Sh2-187
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NGC 2403
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NGC 654
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Coathanger, Loch Ness a.o.
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Ghost of Cassiopeia
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Bode's Galaxy
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Butterfly Nebula (IC 1318)
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NGC 3184
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M 38 in HaRGB
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Comet C/2022 E3 (ZTF)
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NGC 7822
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Pinwheel Galaxy
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Cone Nebula
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Aurora
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NGC 4151 & 4145
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Cave Nebula
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NGC 4725, 4747 & 4712
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The Crescent Nebula
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Lion Nebula
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M 13
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Horsehead Nebula (SHO)
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M 35 & NGC 2158
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Sh2-134 Widefield
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NGC 5033 & Friends
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Clamshell Nebula
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The Dark Mermaid
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Loch Ness Nebula
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Heart & Soul Nebula
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Iris Nebula
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Elephant's Trunk Nebula
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NGC 3718
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Flaming Star Nebula
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IC 410
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Andromeda Galaxy
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Leo Triplet
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Jellyfish Nebula
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M 3
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h and χ Persei (HaRGB)
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VDB 14 & 15
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Northamerica Nebula
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M 106
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Sh2-120 & NGC 7031
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NGC 188
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Tulip Nebula
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Markarian's Chain
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Wizard Nebula
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Bubble & Lobster Claw Nebula
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Copernicus
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Mare Imbrium
