Welcome to the homepage of Nicolàs de Hilster, PhD

InFINNity Deck
- INFO
- The construction of
- Dome automation
- Time-lapses
Astrophotography
- INFO
- Deep Sky...
  - INFO
  - Nebula
  - Planetary Nebula
  - Clusters
  - Galaxies
  - Constellations & Asterisms
- Solar system (Main)...
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  - Sun
  - Mercury
  - Venus
  - Moon
  - Mars
  - Jupiter
  - Saturn
  - Uranus
  - Aurora Borealis
- Solar System (Asteroids)...
  - INFO
  - (4) Vesta
  - (38) Leda
  - 1998 HH49
  - 1999 RM45
- Solar System (Meteors)...
  - INFO
  - Perseid
- Solar System (Comets)...
  - INFO
  - 12P/Pons-Brooks
  - C/2020 F3 NEOWISE
  - C/2020 M3 (Atlas)
  - C/2020 V2 (ZTF)
  - C/2022 E3 (ZTF)
  - C/2023 A3 Tsuchinshan-Atlas
  - C/2025 A6 (Lemmon)
  - C/2025 K1 (Atlas)
- Man-made objects...
  - INFO
  - ISS
Astro-Software
- INFO
- ASCOM Envir. SafetyMonitor
- ASCOM File SafetyMonitor
- ASCOM Generic UPS driver
- ASCOM IP SafetyMonitor
- ASCOM SafetyMonitor Hub
- Astronomical Twilight
- FITSalize
- Log10mGrabber
- MountCMD
- MountMonitor
- PySpectrometer3
Astro Reach-out
- INFO
- Astro Education Topics
- Sun Watching Day
- Zonnekijkdag
Equipment
- INFO
- Telescopes...
  - INFO
  - SkyWatcher Esprit 80ED
  - SkyWatcher Esprit 150ED
  - Celestron C11 XLT EdgeHD
  - Lunt LS80THA
  - GTT60
- SHG700 Spectroscope
- 10Micron GM3000HPS
- Test tools...
  - INFO
  - Bath-interferometer
  - Collimator
  - DPAC
  - Filter test-bench
  - Foucault-test
  - Ronchi-test
- Sundials...
  - INFO
  - 2012 South facing sundial
  - 2017 West facing sundial
White papers
- INFO
- Hardware...
  - INFO
  - Balancing system
  - Camera centring errors
  - Collimator construction
  - Dome Azimuth Calculation
  - Filter focus-offsets
  - RC Collimation
  - Removing lens artefacts
  - Removing Newton-rings
  - Solar Seeing Monitor (DIY)
  - Stability measurements
  - Sun Avoidance Monitor
- Imaging...
  - INFO
  - Imaging artefacts
  - Optimal focal ratio (part 1)
  - Optimal focal ratio (part 2)
  - Solar imaging (part 1)
  - Solar imaging (part 2)
  - Solar imaging (part 3)

Sunspot data for period 2026Q3 (PREV PERIOD - NEXT PERIOD):

6 July 2026	5 July 2026	4 July 2026	3 July 2026	2 July 2026
1 July 2026
Number of observations this quarter: 5

PREV PERIOD - NEXT PERIOD
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