- Globular Clusters (CVn) -

And (1) Boo (1) Del (2) Lyn (1) Sco (2) Sgr (10)
Aql (3) Cap (1) Her (3) Lyr (1) Sct (1) Vir (1)
Aqr (2) Com (3) Hya (1) Oph (9) Ser (4)
Aur (1) CVn (1) Lep (1) Peg (2) Sge (1)

M 3 (GC)

../dss/dss2red_134211.62_+282238.20_18_web.jpg
Image source: DSS II (red) - 18×18'
Name: M3, NGC5272
Type: GC
Constellation: CVn
Coordinates: 13h42m11.62s / +28°22'38.20"
Brightness / Size: 6m4 / 18.0x18.0'
Robert Zebahl
B 8x40, Bortle 7, NELM 5m0, SQM-L 19.0
Compact with well defined edges. Very bright.

EASY
B 7x50, Bortle 8, NELM 4m0
Despite of massive light pollution (city & half moon) and large exit pupil of 7mm I could easily see M3 with direct vision as a quite small, but bright nebula.

EASY
70mm f/5.7, 22x, Bortle 6, SQM-L 19.2
At 22x quite conspicuous with very bright, well defined center, getting much fainter towards the edges. At 57x the outer parts appeared slightly granulous with averted vision.

../sketches/2019-04-01_m3.jpg

EASY
80mm f/6.25, 25x, Bortle 7
Apparent with direct vision due to the bright, well defined center. Outer regions much fainter. At 62x the outer regions seemed slightly granulous.

EASY
102mm f/11, 125x, Bortle 6-, SQM-L 19.2
Very nice view. At 125x the outer parts were quite well resolved and the cluster appeared granulous close to the center. With averted vision I could also glimpse some individual stars.

EASY
4.5" f/8, 50x, Bortle 5
At 50x the outer regions appeared granulous, at 100x quite well resolvable.

EASY
120mm f/5, 18x, Bortle 7, NELM 5m0, SQM-L 19.1
Hazy sky, 1/3 moon: At 18x well defined, very bright center. The edge regions appear granular with averted vision. At 75x the edge regions are partly resolved, the cluster itself appears granular. The center is very compact.

EASY
152mm f/5.9, 129x, Bortle 6, NELM 5m0+, SQM-L 19.3
The whole cluster appeared clearly granular, the edge areas were very well resolved. Many individual stars were visible with averted vision close to the center. The edges appeared irregular due to star chains.

EASY
8" f/6, 37x, Bortle 4, NELM 6m0
Extremely bright center. Outer regions granulous. At 150x the cluster was resolvable close to the center, especially the outer regions. The center was still granulous.

EASY
René Merting
B 4x22, SQM-L 21.5
indirekt auffällig, sobald er ins Bildfeld kommt, kompakt und hell - direkt auch sichtbar

EASY
B 8x20, SQM-L 21.5
klein und kompakt mit Helligkeitszunahme zum Zentrum hin

EASY
B 10x50, SQM-L 21.5
der KS ist auffällig und zur Mitte hin heller werdend, schöner Anblick

EASY
B 16x70, SQM-L 21.5
hell und auffällig - der KS wirkt, wie aus zwei Schalen zusammengesetzt, zum einen das helle innere gut abgegrenzte Zentrum, zum anderen der relativ homogen helle Außenbereich

EASY
B 18x70, SQM-L 21.5
ein riesig großer heller Nebelball mit großem hellem Zentrum - diffuse Außenbereiche

EASY
100mm f/6.4, 71x, SQM-L 21.5
bei 20x sehr auffällig und ein richtig heller Lichtklecks mit Helligkeitszunahme zur Mitte hin - kompaktes Zentrum - bei 71x blinken in den Außenbereichen erste Lichtpünktchen auf - indirekt wirkt der KS leicht strukturiert - die Außenbereiche laufen diffus aus - bei 107x kommen noch einige Sterne hinzu und der KS beginnt leicht auszufransen
EASY