Navigational star chart and data, laser-engraved on a credit card-sized black stainless-steel card.
The Star Navigation Card
HK$235.00Price
Expected to be shipped by the end of October 2026
- The optimized Navigational Star Chart, originally published by the US Naval Observatory, is laser-engraved on the front side
- The chart is plotted with all the 57 navigational stars, Polaris, and the important constellations for celestial navigation
- The constellations are labelled with their official abbreviations by the International Astronomical Union (IAU)
- The navigational stars, Polaris, and the bright stars (with magnitude brighter than 3) are labelled
- On the back side, the names and data of all 57 navigational stars and Polaris are laser-engraved for reference
- The coordinates of stars are plotted and listed in Declination (Dec) and Sidereal Hour Angle (SHA), and on the back side of the card, there is a formula for converting SHA to Right Ascension (RA)
- Made of highly durable and corrosion resistant SUS304 stainless steel
- Laser-engraved graphics, names, symbols and numbers will never fade nor wear off
- With a special scratch-resistant, dirt-repellent and anti-fingerprint coating applied
- Thickness is enhanced to 0.6 mm to ensure the card is highly rigid and durable
- Same size as a credit card (85.5 mm x 54 mm)
- 581% funded on Kickstarter: https://www.kickstarter.com/projects/minuteobjects/the-star-navigation-card
- All images are for reference only. The photos may be slightly different from the actual item in terms of colour due to the lighting during photo shooting or the monitor's display.
- The card sleeves shown in the product images are not included
- Dimensions: 85.5 mm x 54 mm (with rounded corners)
- Thickness: 0.6 mm ± 0.03 mm
- Material: SUS304 stainless steel
- Colour: black
- Coating: scratch-resistant, dirt-repellent and anti-fingerprint coating
- Colour of the engraved information: silvery
- Place of origin: Taiwan
