The Star Navigation Card

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