香港天文論壇

2024 April 01 Sun - Solar surface in white-light, with AR13617, AR13619, AR13620, AR13622, AR13624, AR13625 and possible AR1362a. . Observation through clouds. . AR13617 shows up at (S13W81). No sunspot is observed, leaving just some faculae. AR13619 shows up at (N18W84). A sunspot is observed, embe...

2024 May 10 Asteroid occultation event (16096) 1999 US6 occults UCAC4 345-085711 on 2024-May-10 at 20:34 UT I've prepared finder charts from DSS and The Sky 6. ------------------------------------------------------------ Details: Asteroid : (16096) 1999 US6 Magnitude: 18.9 Star: UCAC4 345-085711 (GS...

2024 May 09 Asteroid occultation event (189562) 2000 SX212 occults UCAC4 368-151311 on 2024-May-09 at 15:54 UT I've prepared finder charts from DSS and The Sky 6. ------------------------------------------------------------ Details: Asteroid : (189562) 2000 SX212 Magnitude: 20.5 Star: UCAC4 368-1513...

Images of AR13617 and AR13619

Images of AR13615

2024 March 29 Sun - Solar surface in Ca-K, with AR13614, AR13615, AR13617, AR13619, AR13620, AR13622 and AR13623. . Observation through clouds, at high GAIN, thus very noisy images. . AR13614, appears at (N16W77). A single sunspot with full penumbra is observed, embedded in plages AR13615 shows up a...

Images of AR13619

Images of AR13617

Images of AR13615 and AR13623

2024 March 29 Sun - Solar surface in white-light, with AR13614, AR13615, AR13617, AR13619, AR13620, AR13622 and AR13623. . Observation through clouds. . AR13614, appears at (N16W77). A single sunspot with full penumbra is observed, embedded in faculae. AR13615 shows up at (S13W71). At least 40 sunsp...

2024 March 29 - Solar halo

from my mobile phone

Images of AR13621 and AR13622

Images of AR13620

Images of AR13617 and AR13619

Images of AR13615 and AR13623