Night Sky Alert
Star trails circling the celestial pole above a volcano, crossed by the straight line of a space station pass
Tonight in Jōetsu, Japan · More in Japan →
22 OUT OF 100

Stay in

Jōetsu night sky · Sat, Oct 17, dark 18:04–5:00 GMT+9
Clouds
46%average tonight
Moon
38%Waxing Crescent
Aurora
Kp 2.0need Kp 9+
Space station
3:2232° high · S→E
  • Aurora unlikely. Tonight's forecast peaks at Kp 2.0. From here you'd usually need about Kp 9, which takes a rare, extreme storm.
  • Space station passes at 3:22, up to 32° high, moving S → E. It looks like a bright, steady star that crosses the sky in a few minutes.
  • Moon 38% lit (Waxing Crescent), above the horizon for 32% of the dark hours.
  • Clouds: about 46% effective cover during dark hours.

Updated just now. Times in Asia/Tokyo (GMT+9).

Photo: Benedikt Markus · CC BY-SA 4.0

Clouds tonight
16:00clouds, % of sky6:00
Aurora reach
Kp 9+ needed
Magnetic latitude 31.4° N, too far from either auroral zone in all but the rarest storms. Tonight's forecast peak: Kp 2.0. Live map →
Moon
38% lit
Waxing Crescent. Up for 32% of dark hours.
Next meteor peak
Orionids
Peak night Oct 21–22 · Moon 82% lit

Next visible space station passes

When (GMT+9)HighestPath
Sun, Oct 18, 3:1932°S → E
Sun, Oct 18, 4:5626°W → NE

Visible passes only: station sunlit, your sky dark. Computed from CelesTrak orbital data.

Launches within view

No scheduled launches within 1,000 km in the next week or so.

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Nearby

Jōetsu, Japan · 37.15°, 138.24° · population 189,430 (GeoNames). The score is an estimate; here's how it's made.