Hemisphere:  Northern
Herbig Haro 425, LBN 248., 


            Antonio F. Sánchez
Herbig Haro 425, LBN 248.
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Technical card

Imaging cameras: FLI ML8300

Software: ASA Autoslew, Sequence...

Filters: Optec 50mm B  ·  Optec 50mm G  ·  Optec 50mm R  ·  Optec 50mm L

Accessory: FLI CFW-2-7 50mm round 7 position filter wheel

Dates:Aug. 19, 2015Aug. 21, 2015Aug. 25, 2015Sept. 3, 2015

Optec 50mm B: 28x480" -25C bin 1x1
Optec 50mm G: 20x480" -25C bin 1x1
Optec 50mm L: 60x360" -25C bin 1x1
Optec 50mm R: 22x480" -25C bin 1x1

Integration: 15.3 hours

Avg. Moon age: 10.19 days

Avg. Moon phase: 51.25%

Bortle Dark-Sky Scale: 2.00

Basic astrometry details

Astrometry.net job: 777782

RA center: 20h 20' 45"

DEC center: +41° 18' 3"

Pixel scale: 1.398 arcsec/pixel

Orientation: -178.171 degrees

Field radius: 0.583 degrees

Resolution: 620x467


Herbig–Haro (HH) objects are small patches of nebulosity associated with newly born stars, and are formed when narrow jets of gas ejected by young stars collide with clouds of gas and dust nearby at speeds of several hundred kilometres per second. Herbig–Haro objects are ubiquitous in star-forming regions, and several are often seen around a single star, aligned with its rotational axis. HH objects are transient phenomena, lasting not more than a few thousand years. They can evolve visibly over quite short astronomical timescales as they move rapidly away from their parent star into the gas clouds of interstellar space (the interstellar medium or ISM). Hubble Space Telescope observations have revealed the complex evolution of HH objects over the period of a few years, as parts of the nebula fade while others brighten as they collide with clumpy material of the interstellar medium. The objects were first observed in the late 19th century by Sherburne Wesley Burnham, but were not recognised as being a distinct type of emission nebula until the 1940s. The first astronomers to study them in detail were George Herbig and Guillermo Haro, after whom they have been named. Herbig and Haro were working independently on studies of star formation when they first analysed the objects, and recognised that they were a by-product of the star formation process. LBN 248 is a very interesting and strange reflection nebula surrounding the low part of the photograph. This area is rarely imaged. Thanks to Mr. Sakib Rasool for suggesting this target. . Information credits: Reipurth B. (1999). "A General Catalogue of Herbig–Haro Objects,".Wikipedia.



Antonio F. Sánchez
License: None (All rights reserved)

Sky plot

Sky plot


Herbig Haro 425, LBN 248., 


            Antonio F. Sánchez