← Back to dex
Trash variable star 5 EP

HD 16723

RA 40.1107° · Dec -14.4491° · star

Loading sky survey…
🌌 View in 3D star map
Tonight’s visibility

Computing the sky for your location…

Score breakdown

· 1 badge
5 pts · Trash
Trash 15 pts → Common
  • Variable star +5
Total score 5

10 more points to reach Common.

Badges

  • Variable star · +5

Trivia

Could we get there?

  • Verdict. Hopelessly far for any craft humanity can build today.

Getting there

  • Aboard Voyager 1. ≈ 10.2 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 909.4 thousand years even at the Parker Solar Probe's 192 km/s.
  • At 10% light speed. ≈ 5824 years in a starship at a tenth of light speed.
  • Distance. 582 light-years from Earth.

Look-back time

  • Look-back time. The light you'd see left around the year 1444.

Saying hello

  • Say hello. A radio message and its reply would take 1165 years round-trip.

Properties

absmag
0.451
bv
0.261
constellation
Cet
dist ly
582.4213
mag
6.71
name
HD 16723
spect
A7IV

About HD 16723

HD 16723 is a trash variable star. It lies about 582.4 light-years from Earth, sits in the constellation Cet, shines at apparent magnitude 6.71 and has spectral type A7IV.

HD 16723 is a trash variable star worth 5 points across 1 science badge. Explore its facts, badges and place on the sky map, then add it to your dex on Spacedle.

How to see it

Look for HD 16723 in the constellation Cet. At apparent magnitude 6.71, it is an easy target for binoculars.

Like any astronomical target, HD 16723 is best seen from a dark site away from city lights, and when it is above the horizon depends on your latitude and the time of year. The visibility panel above works out tonight's viewing window for your saved location.

Why HD 16723 is a trash variable star

HD 16723 scores 5 points on Spacedle's rarity scale, which places it in the trash tier. Another 10 points would lift it into a rarer tier.

That score comes from 1 science badge — Variable star — each earned for a real, measurable property of the object. Rarity on Spacedle is never random: the more remarkable an object's astrophysics, the more badges it collects, the higher it scores, and the rarer it ranks.

spacedle A daily roll through the real universe. © 2026 spacedle. Buy me a coffee

Sky imagery and survey data courtesy of Aladin Lite & CDS, Strasbourg. Object data from the NASA Exoplanet Archive, JPL Small-Body Database, and the ATNF Pulsar Catalogue.