The AsterNym star registry
Áldu
Áldu: the blue-white star of Perseus
blue-white · Perseus · ϵ Per
Áldu is a blue-white star — the colour of the hottest, youngest suns in the constellation Perseus, one of the few thousand stars bright enough to carry an officially recognised name. On a dark, clear night you can find it with your own eyes.
Most stars in the sky are anonymous points of light. Áldu is not — it has held a name across generations of sky-watchers, which makes it a rare thing to attach a name of your own to.
Real star · Personal dedication · Recorded in the AsterNym registry
See what a dedicated page looks like — preview
Áldu at a glance
- Constellation
- Perseus
- Other name
- ϵ Per
- Catalogue number
- HIP 18532
- Distance
- ≈ 638 light-years
- Brightness
- Magnitude 2.89 naked-eye
- Star type
- B0.5V
- Colour
- blue-white
- Best seen from
- The Northern Hemisphere and lower southern latitudes
- Right ascension
- 03h 57m 51s
- Declination
- +40° 00′ 37″
Coordinates are J2000 epoch, checkable against any astronomical source or planetarium app.
What could a Áldu dedication represent?
Áldu is especially meaningful for someone who:
- · Deserves something older than any gift shop
- · Marks a beginning, an anniversary or a promise
- · Is remembered every time you look up
- · Has a light you want recorded somewhere permanent
Dedication idea
“For the one I think of when I find Perseus in the sky.”
Where can you see Áldu?
It is easy to see from most of the Northern Hemisphere. It can also appear from lower southern latitudes, but it never rises for observers south of about latitude 50°S.
Áldu belongs to Perseus.
Dedicate Áldu to someone who matters
A flower fades. A card is eventually put away. A star gives your message a place in the sky.
Your Áldu dedication includes:
- · Your chosen dedication name
- · Your personal message
- · Áldu's real astronomical coordinates
- · A shareable dedication page
- · Its location on the AsterNym Galaxy Map
- · An optional printable certificate and gift presentation
Áldu keeps its established astronomical name. Your dedication is a personal commemorative record within the AsterNym registry.
Frequently asked questions about Áldu
- Is Áldu the brightest star?
- Áldu shines at magnitude 2.89 — visible to the naked eye on a clear night, one of the few thousand stars with an officially recognised name.
- How far away is Áldu?
- Áldu is approximately 638 light-years from Earth. The light reaching us tonight began its journey around 638 years ago.
- Which constellation contains Áldu?
- Áldu is part of Perseus.
- Can everyone see Áldu?
- It is easy to see from most of the Northern Hemisphere. It can also appear from lower southern latitudes, but it never rises for observers south of about latitude 50°S.
- Is dedicating Áldu an official astronomical renaming?
- No. Áldu keeps its internationally recognised astronomical name. An AsterNym dedication records your personal name and message in the AsterNym registry without changing the star's scientific identity.