Statements (104)
| Predicate | Object |
|---|---|
| gptkbp:instance_of |
gptkb:star
|
| gptkbp:bfsLayer |
3
|
| gptkbp:bfsParent |
gptkb:Algol
|
| gptkbp:age |
approximately 200 million years
approximately 3 million years |
| gptkbp:apparent_magnitude |
2.24
2.25 0.1 to 0.3 |
| gptkbp:area |
about 3.5 times that of the Sun
approximately 4.5 times that of the Sun approximately 6.5 times that of the Sun |
| gptkbp:atmosphere |
gptkb:Northern_Hemisphere
|
| gptkbp:average_temperature |
approximately 12,000 K
approximately 15,000 K |
| gptkbp:common_name |
gptkb:Algol
|
| gptkbp:contains |
gptkb:theorem
Beta Persei B Beta Persei C |
| gptkbp:cultural_references |
in literature and art
featured in various mythologies |
| gptkbp:cultural_significance |
various mythologies
|
| gptkbp:depicted_in |
gptkb:theorem
the northern hemisphere autumn and winter months |
| gptkbp:discovered_by |
gptkb:unknown
|
| gptkbp:distance |
93 light years
approximately 60 parsecs |
| gptkbp:has_color |
-0.25
-0.15 -0.14 |
| gptkbp:has_luminosity |
about 100 times that of the Sun
approximately 100 times that of the Sun approximately 1,500 times that of the Sun |
| gptkbp:has_spectral_type |
gptkb:B5_III
B3 III B8 V |
| gptkbp:has_team |
-0.12 arcseconds/year
-0.10 arcseconds/year |
| gptkbp:has_title |
gptkb:Algol
|
| gptkbp:has_variants |
Eclipsing binary
Beta Lyrae type eclipsing binary |
| gptkbp:historical_significance |
known since ancient times
used in navigation used in navigation and timekeeping |
| https://www.w3.org/2000/01/rdf-schema#label |
Beta Persei
|
| gptkbp:includes |
star catalogs
|
| gptkbp:is_a |
gptkb:star
spectroscopic binary astrophysical object blue giant star eclipsing binary star system |
| gptkbp:is_approximately |
196 light years away from Earth
|
| gptkbp:is_associated_with |
mythology and folklore
various scientific studies the Perseus mythological hero Perseus mythological hero |
| gptkbp:is_considered_as |
a benchmark for binary stars
|
| gptkbp:is_known_for |
being a variable star
Demon Star its periodic dimming |
| gptkbp:is_monitored_by |
amateur astronomers
|
| gptkbp:is_noted_for |
its eclipsing nature
|
| gptkbp:is_observed_in |
professional astronomers
various astronomical studies |
| gptkbp:is_part_of |
gptkb:Perseus_constellation
gptkb:Milky_Way_Galaxy gptkb:Milky_Way_galaxy constellation Perseus the celestial sphere the Milky Way's stellar population the Milky Way's Perseus Arm the Perseus constellation family the Algol paradox the Algol system the Algol variable star family the Algol variable star group |
| gptkbp:is_referenced_in |
astronomical databases
|
| gptkbp:is_studied_in |
stellar evolution
|
| gptkbp:is_used_in |
stellar classification systems
navigation and astronomy stellar classification studies |
| gptkbp:lighting |
due to eclipses
0.3 magnitudes |
| gptkbp:located_in |
gptkb:Milky_Way_galaxy
constellation Perseus Declination +40° 57′ 21″ approximately 196 light-years from Earth Declination +40° 57' 21" Right Ascension 3h 8m 10s |
| gptkbp:marketed_as |
gptkb:Beta_Persei
|
| gptkbp:mass |
approximately 3.7 times that of the Sun
about 3.7 times that of the Sun |
| gptkbp:notable_for |
its historical observations
|
| gptkbp:orbital_period |
2.867 days
|
| gptkbp:origin |
from Arabic 'al-ghul' meaning 'the ghoul'
|
| gptkbp:previous_name |
gptkb:Algol
|
| gptkbp:range |
2.3 to 3.4
2.2 to 3.4 |
| gptkbp:title |
Beta Algol
|
| gptkbp:type_of |
eclipsing binary star
|
| gptkbp:was_affecting |
the brightness of nearby stars
|
| gptkbp:year_created |
known since antiquity
about 1669 |