NGC 6743 Open Cluster* in Lyra
Located at: RA 19 hours 01 minutes 27 seconds, Dec +29 degrees 17 minutes 00 seconds
Size: 8.0'; Magnitude: --; Class: cluster?
North is up

West to the right
| Telescope: |
8" f5 Newtonian reflector |
| Camera: |
ST-8XME, self-guided, binned 1x1, temp -20c, camera control MaxIm DL 4.56 |
| Image: |
Lumicon Red filter, 360 minutes (36 x 10 minute subs) 06/22/23/24/2010; seeing 2.0-2.6 FWHM per CCDStack |
| Processing: |
CCDStack 2.6.3800.24688, Photoshop 7.0 |
| Location: |
Rolling Roof Observatory, Thousand Oaks, CA 91360 (+34d 13m 29s -118h 52m 20s) |
| Notes:* |
From "Star Clusters", by Brent Archinal and Steven Hynes; from the Notes, in part: "This is John Herschel's [1833, 462] h 2028, which he lists at (1830.0) 18h 54m 47.7s, NPD 60d 58m 3s. His description is: "A p L, poor cl of stars forming irreg groups or patches, 11.12; diam=8'." ... From the NGC / IC Project: Contemporary Visual Observation(s) for NGC 6743 NGC 6743 19 01 20 +29 16.6 17.5": about 35 stars in a 6' diameter group centered on a bright wide double star h1361 = 8.3/10.6 at 18". The boxy outline stands out reasonably well at 100x. There are no dense spots and the group appears fully resolved. A mag 10 star is at the NW end 4' from h1361. Listed as nonexistent in the RNGC. JH: "A pL, poor cl of stars forming irreg groups or patches, 11..12m, dia =8'." Skiff reports a weak cluster is visible on the POSS centered on HD 176970 at 19 01 26.7 +29 17 14. ~25 stars brighter than mag 13, 5' diameter centered on HD 176970 (8.3/10.6 at 18"). See NGCBUGS. - by Steve GottliebHistorical Research Notes / Correction for NGC 6743 NGC 6743. JH describes this as "A pL, poor cl of stars forming irreg groups or patches, 11 ... 12 m; diam = 8'." About an arcminute preceding his position are three pretty bright stars and roughly 30 fainter ones scattered over an area about 8 - 10 arcmin across. This is doubtless the group that JH saw. As with many of these apparent clusterings, it may not be a real cluster. It will take astrometric and photometric studies to determine whether the stars are neighbors in space. - Dr. Harold G. Corwin, Jr. |