When can I see the ISS from Georgetown?

Geometric passes happen often, but naked-eye spotting needs a dark (or deep-twilight) sky and a sunlit station. This tool flags daylight, near-sun, and eclipsed (unlit) passes, estimates peak magnitude, and highlights the next spottable date and time for planning.

What does ISS magnitude mean?

Magnitude is a brightness scale where more negative numbers are brighter. A peak around mag −2 to −4 can rival Jupiter or approach Venus. Unlit (eclipsed) passes have no usable naked-eye magnitude.

What does a high pass look like?

When peak elevation is 40° or higher the ISS crosses a large arc of sky and can look much brighter. Face the start bearing a few minutes early, then follow it through the peak point on the sky-path chart and simulation.

Tools

Free ISS Pass Predictor · Any Location

Bearings, magnitude, and daylight or eclipse flags — so you chase passes you can actually see.

Georgetown

6.8000°N, 58.1700°W

Next spottable

Sat, Aug 110:55 PM

6d · 17° · NE · mag -2.2

Appear: 10:52 PM N
Gone: 10:59 PM · 7m
Sky: Good to spot

Dark sky and sunlit station. About mag -2.2 Look near the peak bearing.

Sky path

Peak 17° · NE 47°

Outer ring = horizon · centre = zenith · filled dot = peak

Sky sim

Good to spot · mag -2.2 · 119° sun

ISSmag -2.2

Venusmag -4.0

Jupitermag -2.4

Dark sky and sunlit station. About mag -2.2 Look near the peak bearing.

Trail shows the apparent path across your sky. Magnitude is approximate (phase + range); real brightness varies with attitude and atmosphere. Venus/Jupiter shown at typical peak brightness for scale.

Sky path

Peak 17° · NE 47°

Outer ring = horizon · centre = zenith · filled dot = peak

Upcoming

Spottable only

Frequently asked questions

When can I see the ISS from Georgetown?: Geometric passes happen often, but naked-eye spotting needs a dark (or deep-twilight) sky and a sunlit station. This tool flags daylight, near-sun, and eclipsed (unlit) passes, estimates peak magnitude, and highlights the next spottable date and time for planning.
What does ISS magnitude mean?: Magnitude is a brightness scale where more negative numbers are brighter. A peak around mag −2 to −4 can rival Jupiter or approach Venus. Unlit (eclipsed) passes have no usable naked-eye magnitude.
What does a high pass look like?: When peak elevation is 40° or higher the ISS crosses a large arc of sky and can look much brighter. Face the start bearing a few minutes early, then follow it through the peak point on the sky-path chart and simulation.

Orbit data comes from Celestrak TLEs propagated with SGP4. Visibility uses sun altitude, Earth-shadow illumination, and a phase-angle magnitude model. Pair with Stargazing Weather for clear skies.