The Occultation of a 14.4 Star by (2259) Sofievka

Feb 3, 2026 at 2:02:38am

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This is a very faint event, but it lasts a 5.8s on the centerline, and so in a dark sky should be easy. However, it's 38 degrees from an almot full moon. A challenge. Mag drop=2.5. Given the noise of a full moon'd sky, expect the event to probably not reach to 2.5 magnitude down.

Alt = 36, Az=146, in Virgo

Observed from outside carport. I got a 2.4 sigma detection at 16x, centered right on the predicted event time of 10:02:38 UT. It's messy. I could not go to 32x as I perhaps wanted, because the star was then swamped by the sky background. Still, getting a 14.4 magnitude star  at 2.9s duration so close to a full moon is something of a good score.

     

NIE test: 2.4 sigma
magDrop report: percentDrop: 73.6 magDrop: 1.446 +/- 1.002 (0.95 ci)

DNR: 1.61

D time: [10:02:36.9805]
D: 0.6800 containment intervals: {+/- 0.2863} seconds
D: 0.9500 containment intervals: {+/- 1.0876} seconds
D: 0.9973 containment intervals: {+/- 2.4880} seconds

R time: [10:02:39.8605]
R: 0.6800 containment intervals: {+/- 0.2863} seconds
R: 0.9500 containment intervals: {+/- 1.0876} seconds
R: 0.9973 containment intervals: {+/- 2.4880} seconds

Duration (R - D): 2.8800 seconds
Duration: 0.6800 containment intervals: {+/- 0.4782} seconds
Duration: 0.9500 containment intervals: {+/- 1.3966} seconds
Duration: 0.9973 containment intervals: {+/- 3.0660} seconds