The AsterNym star registry
Kaus Borealis
Kaus Borealis: the warm orange star of Sagittarius
warm orange · Sagittarius · λ Sgr
Kaus Borealis is a warm orange giant, far along its stellar life in the constellation Sagittarius, one of the stars with a proper name recognised in the IAU Catalog of Star Names. At magnitude 2.81 it is visible to the naked eye under a dark sky.
Most stars in the sky are anonymous points of light. Kaus Borealis 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
Kaus Borealis at a glance
- Constellation
- Sagittarius
- Other name
- λ Sgr
- Catalogue number
- HIP 90496
- Distance
- ≈ 78 light-years
- Brightness
- Magnitude 2.81 naked-eye
- Star type
- K1 III
- Colour
- warm orange
- Best seen from
- The Southern Hemisphere and lower northern latitudes
- Right ascension
- 18h 28m 31s
- Declination
- −25° 25′ 18″
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 Kaus Borealis?
Kaus Borealis is an orange giant. Its surface runs roughly 4,000 to 5,000°C, cool enough that the light carries a visible orange. 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.
Its colour is not the whole story. An orange star still in the steady part of its life would burn for tens of thousands of millions of years. This one is past that stage, and it is cool at the surface because it has swollen outward, not because it was born this way.
It is a giant, which is what a star becomes when it exhausts the hydrogen in its core. It has swollen outward and cooled at the surface, and it is now brighter than it ever was as a young star. The Sun will do this too, in about five thousand million years.
The light you are looking at is old
The light you can see from Kaus Borealis left in 1948, which puts it roughly a lifetime ago. Nobody has invented anything since then that the light knows about; it has simply been travelling.
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 Kaus Borealis mean?
It bore the traditional name Kaus Borealis, which derives from the Arabic قوس qaws 'bow' and Latin boreālis 'northern'.
In the catalogue of stars in the Calendarium of Al Achsasi al Mouakket, this star was designated Rai al Naaim, which was translated into Latin as Pastor Struthionum, meaning keeper of the ostriches.
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.
What could a Kaus Borealis dedication represent?
Kaus Borealis 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 Sagittarius in the sky.”
Where can you see Kaus Borealis?
It is easy to see from much of the Southern Hemisphere. It can also appear from lower northern latitudes, but it never rises for observers north of about latitude 65°N. It passes directly overhead at latitude 25°S. It stands highest at midnight in June, so June and July evenings are the best time to look. At magnitude 2.81 it is an easy naked-eye star from any reasonably dark spot.
Kaus Borealis belongs to Sagittarius.
What does Kaus Borealis mean in astrology?
The classical fixed-star tradition: Ptolemy, the medieval Behenian lists, Robson’s 1923 compilation. Is silent on Kaus Borealis, 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, Kaus Borealis stands at 6° Capricorn at the J2000 epoch, and the Sun passes that degree around 25 December 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 Kaus Borealis 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 Kaus Borealis →Real star · your message · a page to share
Your Kaus Borealis dedication includes
- Your chosen dedication name
- Your personal message
- Kaus Borealis's real astronomical coordinates
- A shareable dedication page
- Its location on the AsterNym Galaxy Map
- An optional printable certificate and gift presentation
Kaus Borealis keeps its established astronomical name. Your dedication is a personal commemorative record within the AsterNym registry.
Frequently asked questions about Kaus Borealis
- What does Kaus Borealis mean in astrology?
- The classical fixed-star tradition has no documented meaning for Kaus Borealis. Projected onto the zodiac, Kaus Borealis stands at 6° Capricorn, and the Sun passes that degree each year around 25 December.
- Is Kaus Borealis the brightest star?
- Kaus Borealis shines at magnitude 2.81 · visible to the naked eye on a clear night, one of the few thousand stars with an officially recognised name.
- How far away is Kaus Borealis?
- Kaus Borealis is approximately 78 light-years from Earth. The light reaching us tonight began its journey around 78 years ago.
- Which constellation contains Kaus Borealis?
- Kaus Borealis is part of Sagittarius.
- Can everyone see Kaus Borealis?
- It is easy to see from much of the Southern Hemisphere. It can also appear from lower northern latitudes, but it never rises for observers north of about latitude 65°N. It passes directly overhead at latitude 25°S. It stands highest at midnight in June, so June and July evenings are the best time to look. At magnitude 2.81 it is an easy naked-eye star from any reasonably dark spot.
- Is dedicating Kaus Borealis an official astronomical renaming?
- No. Kaus Borealis 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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