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
- Solar system (Main)...
  - INFO
  - Sun
  - Mercury
  - Venus
  - Moon
  - Mars
  - Jupiter
  - Saturn
  - Uranus
- 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 K1 (Atlas)
- Man-made objects...
  - INFO
  - ISS
Astro-Software
- INFO
- ASCOM Generic UPS driver
- ASCOM Envir. SafetyMonitor
- ASCOM File 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
- 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 2025Q4 (PREV PERIOD - NEXT PERIOD):

14 October 2025	13 October 2025	12 October 2025	11 October 2025	10 October 2025
9 October 2025	8 October 2025	7 October 2025	6 October 2025	5 October 2025
4 October 2025	3 October 2025	2 October 2025	1 October 2025
Number of observations this quarter: 7

PREV PERIOD - NEXT PERIOD
Home Geodesy Navigation Astronomy Literature
InFINNity Deck... Astrophotography... Astro-Software... Astro Reach-out... Equipment... White papers...
Deep Sky... Solar system (Main)... Solar System (Asteroids)... Solar System (Meteors)... Solar System (Comets)... Man-made objects...
Sun Mercury Venus Moon Mars Jupiter Saturn Uranus