Galactic Nebula NGC 1788

NGC 1788
NGC 1788: Image taken with the Mayall 4-Meter telescope on Kitt Peak © 2020 T.A. Rector (University of Alaska Anchorage), H. Schweiker (WIYN and NOIRLab/NSF/AURA) & S. Pakzad (NOIRLab/NSF/AURA) [635]


This nebula was discovered by William Herschel on 1st February 1786 using his 18.7 inch reflector. He cataloged it as V 32 and noted: «Considerably bright, very large, much diffused and vanishing. Near and south following bright star.» [464] Dreyer added the nebula as NGC 1788 to his New General Catalogue published in 1888. [313]

In 1946 the Swedish astronomer Sven Cederblad published a study of bright diffuse galactic nebulae where he listed NGC 1788 as Cederblad 40. [130]

The American astronomer Beverly T. Lynds published in 1962 her «Catalogue of Dark Nebulae» that she found on the blue and red photo plates of the «National Geographic Palomar Observatory Sky Atlas» (POSS), taken with the 48 inch Oschin Schmidt telescope at Mount Palomar Observatory. The dark cloud west of NGC 1788 she listed as LDN 1615 and the dark cloud within as LDN 1616. [473] In 1965 she published then her catalog of bright nebulae where NGC 1788 is listed as LBN 203.49-24.76 (LBN 916). [270]

Sometimes this nebula is called «Cosmic Bat Nebula» or just «Bat Nebula». An ambiguous name that is also used for other nebulae: LDN 43 (dark nebula in Ophiuchus, NGC 6995 (eastern part of Veil Nebula in Cygnus), Sh 2-129 (Flying Bat Nebula in Cepheus).

Physical Properties

NGC 1788 is a starforming region with reflection nebula surrounded by a glowing red ring of hydrogen gas. The stars inside the nebula are only about a million years old, which is very young compared to most stars. The ring of glowing hydrogen gas is energized by nearby hot, massive stars. [635]

Revised+Historic NGC/IC, Version 22/9, © Dr. Wolfgang Steinicke [277]
DesignationNGC 1788
Right Ascension (J2000.0)05h 06m 53.2s
Declination (J2000.0)-03° 20' 28"
Diameter5 × 3 arcmin
Metric Distance0.400 kpc
Dreyer DescriptionB, cL, R, bM *** 15, * 10, 1½' 318°, inv in the neby
Identification, RemarksLBN 916

Finder Chart

The Nebula NGC 1788 is located in Orion, approximately 2° north of the 2.7 mag star Cursa (β Eridani) which marks the beginning of the river eri. It is best observed in the months of October through March.

Finder Chart Galactic Nebula NGC 1788
Galactic Nebula NGC 1788 in constellation Orion. Charts created using SkySafari 6 Pro and STScI Digitized Sky Survey. Limiting magnitudes: Constellation chart ~6.5 mag, DSS2 close-ups ~20 mag. [149, 160]

Visual Observation

Description pending ...

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