The AsterNym star registry
Diadem
Diadem: the yellow-white star of Coma Berenices
yellow-white · Coma Berenices · α Com
Diadem is a yellow-white star, a near cousin of our own Sun's colour in the constellation Coma Berenices, 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. Diadem 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
Diadem at a glance
- Constellation
- Coma Berenices
- Other name
- α Com
- Catalogue number
- HIP 64241
- Distance
- ≈ 58 light-years
- Brightness
- Magnitude 4.85 naked-eye
- Star type
- F5V
- Colour
- yellow-white
- Best seen from
- Almost everywhere on Earth
- Right ascension
- 13h 09m 59s
- Declination
- +17° 31′ 46″
Coordinates are J2000 epoch, checkable against any astronomical source or planetarium app.
What could a Diadem dedication represent?
Diadem 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 Coma Berenices in the sky.”
Where can you see Diadem?
It sits near the celestial equator, so nearly every inhabited latitude gets a view of it at some point in the year.
Diadem belongs to Coma Berenices.
Dedicate Diadem to someone who matters
A flower fades. A card is eventually put away. A star gives your message a place in the sky.
Your Diadem dedication includes:
- · Your chosen dedication name
- · Your personal message
- · Diadem's real astronomical coordinates
- · A shareable dedication page
- · Its location on the AsterNym Galaxy Map
- · An optional printable certificate and gift presentation
Diadem keeps its established astronomical name. Your dedication is a personal commemorative record within the AsterNym registry.
Frequently asked questions about Diadem
- Is Diadem the brightest star?
- Diadem shines at magnitude 4.85 — visible to the naked eye on a clear night, one of the few thousand stars with an officially recognised name.
- How far away is Diadem?
- Diadem is approximately 58 light-years from Earth. The light reaching us tonight began its journey around 58 years ago.
- Which constellation contains Diadem?
- Diadem is part of Coma Berenices.
- Can everyone see Diadem?
- It sits near the celestial equator, so nearly every inhabited latitude gets a view of it at some point in the year.
- Is dedicating Diadem an official astronomical renaming?
- No. Diadem 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.