PISMIS 4

OPEN CLUSTER WITH NEBULOSITY IN VELA SNR

(ra: 08h 35' 0"/ dec -44º 18')

January 2013, -  Camping La Porteña, Areco, Buenos Aires - Argentina

DATA

TYPE: Cluster associated with nebulosity

APPARENT DIAMETER: 18 arc minutes

VISUAL BRIGHTNESS: 5.9

DISTANCE: 1930 light years

IMAGE INFORMATION

SCOPE: AT RC 8" Astrograph Ritchie Chrétien 

CAMERA: QSI 583 WS

GUIDING: Off Axis / SX LodeStar / PHD Guiding

FILTERS: Baader LRGB Set

SKY CONDITIONS: Rural Skies.

EXPOSURES: LRGB (60,30,30,30) - LRGB bin 2x2

OBJECT DESCRIPTION AND IMAGE SESSION

Pismis 4 is a colourful open cluster in the edge of Vela Supernova Remnant. It contain around 45 stars identified in the cluster with the brightest at magnitude 7.3. Visible in the background we have the filaments of one of the two loops of the Vela SNR which make this object a nice target for large focal lengths telescopes

Paris Marie Pismis was an astronomer of Armenian descent (1911-1999) who studied open clusters in Mexico and was the first woman to graduate from the scientific faculty of Istanbul University. (*)

(*) Free adaptation of Don Goldman description on Pismis 4