NGC2244 star cluster in the Rosette Nebula. Almost 6 hours of #OSCNB exposure in enhanced HOO palate. Austin, Texas, Bortle 7 sky on 2024-01-07, 69 5' exposures with master dark. WO RedCat 250/51mm, L-Ultimate dual NB filter, ASI533 MC camera, ASIAIR + #astrophotography #astronomy #astroambassadors