Pic du Midi
From Pic du Midi (42.9°N), a Bortle 3 dark-sky site, you can see far more than the ISS and Tiangong — a sky this dark reveals faint satellites like individual Starlinks and the Hubble Space Telescope that are invisible from any city. Best viewing is during twilight, after sunset or before dawn. Tonight’s pass times for Pic du Midi are shown below.
As of 23 August 2026, the Moon is 78% illuminated (waxing gibbous), making it a poor night for faint objects here — the Moon will wash out most of what this sky can show. The next new moon is 11 September, about 19 days away — that fortnight is the window worth travelling for.
Pic du Midi is one of the darkest locations in Hautes-Pyrénées, France — a Bortle Class 3 sky that unlocks satellites completely invisible from any city. Live pass times are computed for your exact location here.
Bortle is a 1–9 scale of night-sky darkness: 1 is the darkest (pristine wilderness), 9 is an inner-city sky. The lower the number, the more faint satellites, Starlinks and stars come into view.
What you can see here that you can’t see from the city
A Bortle 3 sky has a naked-eye limiting magnitude of approximately 6.8 — significantly deeper than a suburban sky, revealing fainter satellites.
How this rating was set: the Bortle class is an estimate for the main observing area, calibrated against DarkSky International’s published documentation where the site is certified and regional light-pollution mapping where it is not. It is not a single measured reading — sky quality shifts with your exact position, the moon and how much of your horizon is open. For a reading at your own spot, check lightpollutionmap.info.
| Satellite | Magnitude | From here | Notes |
|---|---|---|---|
| ISS (Zarya) | mag -4.0 | ✓ Visible | City-visible. Magnitude up to −4, dazzling even under street lights. |
| Tiangong (CSS) | mag -2.0 | ✓ Visible | City-visible. Slightly dimmer than the ISS with an orange tint. |
| Hubble (HST) | mag +1.5 | ✓ Visible | Visible here — needs a dark sky. Distinctive blue-white colour. |
| AST BlueBird-6 | mag +1.5 | ✓ Visible | Visible here — as bright as Hubble. Often spotted in pairs. |
| BlueBirds 1–5 | mag +4.0 | ✓ Visible | Visible here under this Bortle 3 sky. A dark-sky exclusive target. |
| Starlink (single) | mag +5.0 | ✓ Visible | Individual Starlinks reachable here with Bortle 3. |
Magnitudes are peak naked-eye brightness. Visibility also depends on elevation angle, phase, and local transparency.
Best conditions at Pic du Midi
The sky over Pic du Midi: what your latitude shows
At 42.9°N, Pic du Midi sits in the Northern Hemisphere, and the shape of the sky follows from that. Polaris sits about 43° above your northern horizon, and any star within 47° of it never sets.
The Milky Way's bright core in Sagittarius stays fairly low — culminating about 18° up toward the south, so a low, unobstructed southern horizon is worth seeking out here. The Magellanic Clouds stay below your horizon entirely — they're a Southern-Hemisphere prize you'd have to travel south to catch. The Southern Cross never properly rises from this latitude. Because the core sits to the south and never climbs high, it's best from late spring through summer (roughly May to August), low over a dark southern horizon.
Tiangong, China's space station, orbits at 41.5° inclination — so at 43° you sit on or inside its ground track and it can ride high, even near overhead, blazing as bright as the brightest stars. The ISS (51.6° inclination) is visible on most clear nights, climbing higher in the sky the closer your timing is to an overhead pass. It's a mid-latitude sky — most of the year's named passes and showpieces are reachable from here with the right timing.
Dark Sky Satellite Spotting — FAQ
How dark is Pic du Midi?
Pic du Midi is rated Bortle Class 3 on the nine-point scale — a dark rural sky with some light pollution on the horizon. At this level the limiting magnitude for the naked eye is approximately 6.8, meaning you can see stars far fainter than in any urban setting.
Can I see satellites from Pic du Midi?
Yes — and far more than you can from a city. The ISS and Tiangong are visible from everywhere, but Pic du Midi's Bortle 3 sky unlocks the Hubble Space Telescope, AST's BlueBird satellites, and individual Starlink satellites that are simply invisible against a lit urban sky. Use the live pass times above to plan your session.
What satellites are unique to dark skies at Pic du Midi?
At Bortle 3, AST's BlueBird satellites become reachable naked-eye targets — something no city observer can achieve. Individual Starlinks in their operational shells are also visible, whereas from a city you only see the bright post-launch trains. Hubble (mag 1.5) is another dark-sky exclusive: easily found here, nearly impossible from suburbs.
What is the best time of year to observe at Pic du Midi?
October – March offers the best conditions. Northern winter nights are longest, temperatures are cold but skies are crisp and transparent. Avoid June – July when longer twilights reduce the available darkness window. Moon phase matters enormously at dark sky sites — a new moon week during October – March is the prime target.
How do I find Pic du Midi?
Pic du Midi is located in Hautes-Pyrénées, France, at 42.94°N, 0.14°E, approximately 150 km from Toulouse. It holds DarkSky International Dark Sky Reserve certification — the Réserve Internationale de Ciel Étoilé du Pic du Midi, one of six in France. Check access conditions and any permits required before visiting.
Does Pic du Midi's hemisphere affect what I can see?
Yes — from the Northern Hemisphere, Polaris and the Big Dipper dominates the overhead sky, and the Milky Way core arches in the southern direction. At Bortle 3, the Milky Way is fully resolved and the naked-eye limiting magnitude is 6.8, making this one of the better sites in Hautes-Pyrénées for satellite spotting.
For all dark sky sites worldwide: Dark Sky Site directory.