Preview. This is a sample dedication, shown so you can see what a dedicated star page looks like.
A dedicated star
Hydor
blue-white · Cetus · 2 Cet
Dedicated to
Maya
by Her sister, June · August 12, 2026
“You were born on the brightest night of my life. Whenever you feel small, remember: there is a star that has carried your name since before you could read it, and it is still up there, still burning, still yours.”
This dedication
- Dedicated to
- Maya
- Dedicated by
- Her sister, June
- Recorded
- August 12, 2026
- Held until
- August 12, 2027
When this dedication ends, Hydor becomes available again. Want it? Put the date in your calendar.
Hydor at a glance
- Constellation
- Cetus
- Other name
- 2 Cet
- Catalogue number
- HIP 301
- Distance
- ≈ 272 light-years
- Brightness
- Magnitude 4.54 naked-eye
- Star type
- B9IVn
- Colour
- blue-white
- Best seen from
- Almost everywhere on Earth
- Right ascension
- 00h 03m 44s
- Declination
- −17° 20′ 10″
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 Hydor?
Hydor is a blue-white subgiant. Its surface runs somewhere between 10,000 and 30,000°C, which is what gives it a blue-white cast. 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.
It is spending its fuel at a rate the Sun never will. Most of the bright stars in familiar constellations are this kind, which is why the night sky looks younger and hotter than the average star actually is.
A star of this class gets tens of millions of years, against the Sun's ten thousand million.
It is a subgiant, caught in the short crossing between an ordinary life and a giant one. Its core has run out of hydrogen but its outer layers have not finished expanding, and astronomically this stage passes quickly.
Hydor barely moves against the background sky, which is mostly a statement about how far away it is. For every practical purpose, including yours, it is fixed.
The light you are looking at is old
The light arriving from Hydor tonight left in about 1754, some 272 years ago. Everything that has happened since, every person you have heard of from the last few centuries, happened while it was in transit.
That delay is the part people find hardest and like most. A star is the one thing you can give someone that was already old before either of you was born and will outlast anything else you could have chosen.
It is comfortably visible without equipment on a decent night.
What does the name Hydor mean?
The ancient Greek term Hydor (ὕδωρ), meaning water, originally referred to a constellation of faint stars in the region of Aquarius and Cetus.
Name origin from English Wikipedia. AsterNym does not invent an etymology where none is recorded, and most stars in this catalogue have none: they carry modern names, or a catalogue designation and nothing older.
Where can you see Hydor?
It sits 17° south of the celestial equator, so it clears the horizon everywhere short of latitude 73°N, in practice, every inhabited latitude on Earth. It passes directly overhead at latitude 17°S. It stands highest at midnight in September, so September and October evenings are the best time to look. At magnitude 4.54 it is a naked-eye star only under a dark sky, binoculars make it certain.
Hydor belongs to Cetus.
What does Hydor mean in astrology?
The classical fixed-star tradition: Ptolemy, the medieval Behenian lists, Robson’s 1923 compilation. Is silent on Hydor, 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, Hydor stands at 23° Pisces at the J2000 epoch, and the Sun passes that degree around 14 March 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.
Frequently asked questions about Hydor
- What does Hydor mean in astrology?
- The classical fixed-star tradition has no documented meaning for Hydor. Projected onto the zodiac, Hydor stands at 23° Pisces, and the Sun passes that degree each year around 14 March.
- Is Hydor the brightest star?
- Hydor shines at magnitude 4.54 · visible to the naked eye on a clear night, one of the few thousand stars with an officially recognised name.
- How far away is Hydor?
- Hydor is approximately 272 light-years from Earth. The light reaching us tonight began its journey around 272 years ago.
- Which constellation contains Hydor?
- Hydor is part of Cetus.
- Can everyone see Hydor?
- It sits 17° south of the celestial equator, so it clears the horizon everywhere short of latitude 73°N, in practice, every inhabited latitude on Earth. It passes directly overhead at latitude 17°S. It stands highest at midnight in September, so September and October evenings are the best time to look. At magnitude 4.54 it is a naked-eye star only under a dark sky, binoculars make it certain.
- Is dedicating Hydor an official astronomical renaming?
- No. Hydor 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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