| Dark nebula | |
|---|---|
 | |
| Observation data:J2000epoch | |
| Right ascension | 20h 39.5m[1] |
| Declination | +68° 00.7′[1] |
| Distance | 1,400 ly (440[1] pc) |
| Constellation | Cepheus |
| See also:Lists of nebulae | |
L 1157 is adark nebula in the constellationCepheus. It was catalogued in 1962 by U.S. astronomer Beverly T. Lynds in herCatalogue of Dark Nebulae, becoming the 1157th entry in the table; hence the designation.[2] It includesprotostars that are ejecting material in bipolar outflows, forming bow shocks in the surrounding ambient gas.Formamide andHCNO have been detected in these shocked regions, among other compounds.[3]
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