Grazing Occultation of Mars Magnitude -1.4 [Red = -1.4] Date: 2025 Jan 14 4h 32m, to 2025 Jan 14 4h 41m E. Longit. Latitude U.T. Sun Moon TanZ PA AA CA o ' " o ' " h m s Alt Alt Az o o o Inner limit - Mars fully obscured - 12 0 0 39 41 13.4 4 32 9 46 266 0.97 30.8 19.99 -75.67N - 11 45 0 39 30 7.2 4 32 38 46 267 0.98 30.8 20.04 -75.73N - 11 30 0 39 18 58.6 4 33 6 45 267 0.99 30.9 20.10 -75.79N - 11 15 0 39 7 47.9 4 33 35 45 268 1.00 30.9 20.15 -75.85N - 11 0 0 38 56 35.1 4 34 4 45 268 1.01 31.0 20.20 -75.91N - 10 45 0 38 45 20.3 4 34 32 44 268 1.02 31.0 20.25 -75.96N - 10 30 0 38 34 3.5 4 35 1 44 269 1.03 31.1 20.30 -76.02N - 10 15 0 38 22 44.8 4 35 29 44 269 1.04 31.1 20.35 -76.07N - 10 0 0 38 11 24.3 4 35 57 44 270 1.05 31.2 20.40 -76.13N - 9 45 0 38 0 2.1 4 36 25 43 270 1.06 31.2 20.45 -76.18N - 9 30 0 37 48 38.2 4 36 54 43 270 1.07 31.3 20.49 -76.23N - 9 15 0 37 37 12.8 4 37 22 43 271 1.08 31.3 20.54 -76.29N - 9 0 0 37 25 45.8 4 37 50 42 271 1.09 31.4 20.58 -76.34N - 8 45 0 37 14 17.5 4 38 18 42 272 1.11 31.4 20.63 -76.39N - 8 30 0 37 2 47.8 4 38 45 42 272 1.12 31.4 20.67 -76.43N - 8 15 0 36 51 17.0 4 39 13 42 272 1.13 31.5 20.71 -76.48N - 8 0 0 36 39 44.9 4 39 41 41 273 1.14 31.5 20.76 -76.53N - 7 45 0 36 28 11.8 4 40 8 41 273 1.15 31.6 20.80 -76.57N - 7 30 0 36 16 37.8 4 40 35 41 274 1.17 31.6 20.84 -76.62N - 7 15 0 36 5 2.8 4 41 3 40 274 1.18 31.6 20.88 -76.66N - 7 0 0 35 53 26.9 4 41 30 40 274 1.19 31.7 20.91 -76.71N Outer limit - Mars just touches the moon - 12 0 0 40 6 4.2 4 31 30 46 266 0.97 30.6 19.79 -75.44N - 11 45 0 39 55 0.0 4 31 58 46 266 0.98 30.6 19.84 -75.50N - 11 30 0 39 43 53.4 4 32 27 45 267 0.99 30.7 19.89 -75.56N - 11 15 0 39 32 44.5 4 32 55 45 267 1.00 30.7 19.95 -75.62N - 11 0 0 39 21 33.5 4 33 24 45 267 1.01 30.8 20.00 -75.68N - 10 45 0 39 10 20.3 4 33 52 45 268 1.02 30.8 20.05 -75.73N - 10 30 0 38 59 5.1 4 34 21 44 268 1.03 30.9 20.10 -75.79N - 10 15 0 38 47 48.0 4 34 49 44 269 1.04 30.9 20.15 -75.85N - 10 0 0 38 36 29.0 4 35 18 44 269 1.05 31.0 20.20 -75.90N - 9 45 0 38 25 8.2 4 35 46 43 270 1.06 31.0 20.24 -75.95N - 9 30 0 38 13 45.6 4 36 14 43 270 1.07 31.1 20.29 -76.01N - 9 15 0 38 2 21.4 4 36 42 43 270 1.08 31.1 20.34 -76.06N - 9 0 0 37 50 55.6 4 37 10 43 271 1.09 31.2 20.38 -76.11N - 8 45 0 37 39 28.3 4 37 38 42 271 1.10 31.2 20.43 -76.16N - 8 30 0 37 27 59.6 4 38 6 42 272 1.11 31.2 20.47 -76.21N - 8 15 0 37 16 29.6 4 38 33 42 272 1.12 31.3 20.51 -76.26N - 8 0 0 37 4 58.4 4 39 1 41 272 1.14 31.3 20.55 -76.30N - 7 45 0 36 53 26.0 4 39 28 41 273 1.15 31.4 20.60 -76.35N - 7 30 0 36 41 52.6 4 39 56 41 273 1.16 31.4 20.64 -76.39N - 7 15 0 36 30 18.1 4 40 23 40 273 1.17 31.4 20.68 -76.44N - 7 0 0 36 18 42.8 4 40 50 40 274 1.18 31.5 20.71 -76.48N Path coordinates are referred to WGS84 (as used by GPS), with the nominal site altitude being referenced to Mean Sea Level. The path is adjusted for the effects of refraction at low moon altitudes. Angular diameter of Mars = 14.57 arcsec Projected diameter of star 13 meters [Estimated] Librations Long +4.56 Lat -5.39 P +20.13 D +6.90 Illumination of moon 100%- Elongation of Moon 175 Vertical Profile Scale approx. 2.16 km/arcsec at mean distance of moon Horizontal Scale Factor 1.78 deg/min At longitude -9.50: Limiting Magnitudes for various telescope apertures (in cm) CA\Tdia 5 10 15 20 25 30 35 -80.2 2.0 3.4 4.1 4.6 4.9 5.1 5.2 -78.2 2.0 3.4 4.1 4.6 4.9 5.1 5.2 -76.2 2.0 3.4 4.1 4.6 4.9 5.1 5.2 -74.2 2.0 3.4 4.1 4.6 4.9 5.1 5.2 -72.2 2.0 3.4 4.1 4.6 4.9 5.1 5.2