The AsterNym star registry
Achird
Achird: the golden star of Cassiopeia
golden · Cassiopeia · η Cas
Achird is a golden star, warmer-toned than our Sun in the constellation Cassiopeia, one of the stars with a proper name recognised in the IAU Catalog of Star Names. At magnitude 3.46 it is visible to the naked eye under a dark sky.
Most stars in the sky are anonymous points of light. Achird is not. Some IAU-recognised names are ancient; others were adopted by the IAU only recently. Either way, the star already has a scientific identity, and a dedication attaches a human story to it.
Real star · Personal dedication · Recorded in the AsterNym registry
See what a dedicated page looks like: preview
Achird at a glance
- Constellation
- Cassiopeia
- Other name
- η Cas
- Catalogue number
- HIP 3821
- Distance
- ≈ 19.0 light-years
- Brightness
- Magnitude 3.46 naked-eye
- Star type
- G0V SB
- Colour
- golden
- Best seen from
- The Northern Hemisphere and lower southern latitudes
- Right ascension
- 00h 49m 06s
- Declination
- +57° 48′ 55″
J2000 catalogue coordinates that can be independently cross-checked against astronomical databases. A planetarium app showing coordinates of date will differ slightly, because proper motion and precession move a star’s apparent position over time.
What kind of star is Achird?
Achird is a yellow main-sequence star. Its surface runs about 5,500°C, near enough the Sun's own surface temperature. Colour in a star is a temperature reading rather than a decoration: the hot ones are blue and the cool ones red, the opposite way round to a kitchen tap.
This is the Sun's class. Looking at a star like this is the closest you get to seeing what our own star looks like from outside, which is a stranger thought than it first sounds.
A star of this class gets around ten thousand million years, and the Sun is halfway through its own.
It is a main-sequence star, which despite the word dwarf simply means it is in the long stable middle of its life, fusing hydrogen in its core exactly as the Sun is doing now.
Achird is one of the fastest-moving stars in the sky. It shifts about 122 arcseconds every century, which sounds tiny and is not: over a human lifetime it visibly changes position against the stars behind it. The constellations are not fixed, they are just slow, and this one is in a hurry.
The light you are looking at is old
Light travels fast but not instantly, so what reaches your eye from Achird tonight set out in 2007. That is inside a single lifetime. Someone alive now was already alive when this particular light left.
Distance is also the honest limit of what a star can be to you. It is a real object, unimaginably large, and it does not know you exist. What it can be is a fixed point you agreed to attach a meaning to, which is the oldest use people have ever had for the sky.
It is comfortably visible without equipment on a decent night.
What could a Achird dedication represent?
Achird 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 Cassiopeia in the sky.”
Where can you see Achird?
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 32°S. It passes directly overhead at latitude 58°N. It stands highest at midnight in October, so October and November evenings are the best time to look. At magnitude 3.46 it is a naked-eye star only under a dark sky, binoculars make it certain.
Achird belongs to Cassiopeia.
What does Achird mean in astrology?
The classical fixed-star tradition: Ptolemy, the medieval Behenian lists, Robson’s 1923 compilation. Is silent on Achird, and we don’t invent lore where none exists. What astrology can still read is the star’s real position, below.
Projected onto the zodiac the way fixed-star astrology reads any star, Achird stands at 10° Taurus at the J2000 epoch, and the Sun passes that degree around 30 April in the years around 2000. Fixed-star longitude shifts slowly against the tropical zodiac because of precession, about one degree every seventy-two years, so a natal conjunction must be calculated for the birth year rather than read off this J2000 value or a calendar date.
Traditional interpretations, not facts or predictions. The position and dates are computed.
Dedicate Achird to someone who matters
A flower fades. A card is eventually put away. A star gives your message a place in the sky.
from$29.95a year
Dedicate Achird →Real star · your message · a page to share
Your Achird dedication includes
- Your chosen dedication name
- Your personal message
- Achird's real astronomical coordinates
- A shareable dedication page
- Its location on the AsterNym Galaxy Map
- An optional printable certificate and gift presentation
Achird keeps its established astronomical name. Your dedication is a personal commemorative record within the AsterNym registry.
Frequently asked questions about Achird
- What does Achird mean in astrology?
- The classical fixed-star tradition has no documented meaning for Achird. Projected onto the zodiac, Achird stands at 10° Taurus, and the Sun passes that degree each year around 30 April.
- Is Achird the brightest star?
- Achird shines at magnitude 3.46 · visible to the naked eye on a clear night, one of the few thousand stars with an officially recognised name.
- How far away is Achird?
- Achird is approximately 19.0 light-years from Earth. The light reaching us tonight began its journey around 19 years ago.
- Which constellation contains Achird?
- Achird is part of Cassiopeia.
- Can everyone see Achird?
- 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 32°S. It passes directly overhead at latitude 58°N. It stands highest at midnight in October, so October and November evenings are the best time to look. At magnitude 3.46 it is a naked-eye star only under a dark sky, binoculars make it certain.
- Is dedicating Achird an official astronomical renaming?
- No. Achird 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.
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