Hemisphere:  Northern
LBN 640 ( Remnant Molecular Cloud  RMC2  OB1 Per) , 


            Antonio F. Sánchez
LBN 640 ( Remnant Molecular Cloud  RMC2  OB1 Per)
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LBN 640 ( Remnant Molecular Cloud RMC2 OB1 Per)

Technical card

Imaging telescopes or lenses: ASA N12 astrograph

Imaging cameras: FLI ML8300

Mounts: ASA DDM85 S-XL

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:Oct. 26, 2013Oct. 27, 2013Oct. 28, 2013Oct. 29, 2013

Optec 50mm B: 14x600" -25C bin 1x1
Optec 50mm G: 14x600" -25C bin 1x1
Optec 50mm L: 57x600" -25C bin 1x1
Optec 50mm R: 17x600" -25C bin 1x1

Integration: 17.0 hours

Avg. Moon age: 23.07 days

Avg. Moon phase: 40.49%

Bortle Dark-Sky Scale: 2.00

Basic astrometry details

Astrometry.net job: 99124

RA center: 1h 49' 21"

DEC center: +53° 52' 30"

Pixel scale: 1.297 arcsec/pixel

Orientation: 179.944 degrees

Field radius: 0.585 degrees

Resolution: 620x465


NOTES: O and B stars are not distributed at random in the sky, but instead concentrated in loose conmoving groups that Ambartsumian (1947) first referred to as OB associations.OB associations are generally distributed along spiral arms and con-fined to the Galactic plane. Some of the best evidence that the formation of massive starscan induce the formation of other low-to high-mass has been found in OB associations..around the region occupied by the Per OB1 association,a number of the candidate PMS stars at Galactic latitudes as low as about -10º appear to be close to or coincident with dust clouds. An examination of optical images from DSS2 reveals bright rimmed clouds,comet-shaped clouds and reflection clouds coincident with these dust clouds. A search of the catalog of bright nebulae compiled by Lynds (1965), reveals that RMC2 ( Remnant Molecular Cloud) is associated with LBN 640. Credits of information: Hsu Tai-Lee and Jeremy Lim. Astrophysical Journal 679, (2008),1352. The American Astronomical Society.



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

Sky plot

Sky plot


LBN 640 ( Remnant Molecular Cloud  RMC2  OB1 Per) , 


            Antonio F. Sánchez