Statements (276)
| Predicate | Object |
|---|---|
| gptkbp:instance_of |
gptkb:star
|
| gptkbp:age |
gptkb:Alpha_Centauri_B
gptkb:the_Sun gptkb:Alpha_Centauri_A gptkb:Sun 10 billion years approximately 4.85 billion years 4.85 billion years 7 billion years |
| gptkbp:apparent_magnitude |
15.5
|
| gptkbp:atmosphere |
yes
hydrogen and helium |
| gptkbp:average_temperature |
3000 K
3100 K 3042 K approximately 3000 K 3040 K 2730 K 3,050 K 3050 K 2340 K 3,042 K |
| gptkbp:closest_star_to_earth |
gptkb:true
|
| gptkbp:components |
gptkb:Alpha_Centauri
|
| gptkbp:composed_of |
mostly hydrogen and helium
|
| gptkbp:contains_star |
gptkb:Alpha_Centauri_B
gptkb:Alpha_Centauri_A |
| gptkbp:coordinates |
(0, 0, 0)
(0.0, -0.1, -0.1) l = 300.0°, b = -20.0° |
| gptkbp:country |
gptkb:Proxima_Centauri_b
gptkb:Proxima_b gptkb:Proxima_Centauri_c gptkb:Proxima_Centauri_system gptkb:Proxima_Centauri_d gptkb:Yes |
| gptkbp:declination |
-62° 40' 46.141
|
| gptkbp:discovered_by |
gptkb:Robert_Innes
1915 |
| gptkbp:discovery_year |
1915
|
| gptkbp:distance |
4.24 light years
1.295 parsecs |
| gptkbp:distance_from_alpha_centauri_a |
0.21 light years
|
| gptkbp:distance_from_alpha_centauri_b |
0.21 light years
|
| gptkbp:distance_from_earth |
4.24 light years
1.295 parsecs |
| gptkbp:eccentricity |
0.2
0.0 |
| gptkbp:has_color |
1.5
+1.5 |
| gptkbp:has_distance_from_alpha_centauri_a |
0.21 light years
approximately 0.21 light years |
| gptkbp:has_distance_from_alpha_centauri_b |
0.21 light years
approximately 0.19 light years |
| gptkbp:has_field |
yes
strong strong magnetic field |
| gptkbp:has_flare_activity |
yes
|
| gptkbp:has_gravitational_pull |
0.0006 g
|
| gptkbp:has_luminosity |
0.0015 times that of the Sun
0.0015 solar luminosities |
| gptkbp:has_method |
astrometry
|
| gptkbp:has_proximity_to |
gptkb:Alpha_Centauri_B
gptkb:Alpha_Centauri_A |
| gptkbp:has_radius |
0.14 solar radii
approximately 0.14 solar radii 0.154 solar radii |
| gptkbp:has_solar_radius |
0.14
|
| gptkbp:has_spectral_type |
M5.5
M5.5 Ve M5.5 Vc |
| gptkbp:has_stellar_classification |
M-type star
|
| gptkbp:has_type |
gptkb:Dwarves
|
| https://www.w3.org/2000/01/rdf-schema#label |
Proxima Centauri
|
| gptkbp:is_a |
gptkb:main-sequence_star
gptkb:red_dwarf_star gptkb:astronomy gptkb:Dwarves gptkb:multiverse gptkb:star single star system flare star M-type star star in the Milky Way single star stellar body nearby star cool star exoplanet host star low-mass star stellar neighbor stellar object in Centaurus subdwarf star exoplanet host star system member star with exoplanets subtype of M-type star |
| gptkbp:is_a_subject_of |
scientific studies
|
| gptkbp:is_approximately |
4.24 light years from Earth
0.12 times the mass of the Sun 4.24 light years away from Earth 4.24 light years away |
| gptkbp:is_associated_with |
SETI projects
|
| gptkbp:is_closest_star_to |
gptkb:Earth
|
| gptkbp:is_closest_star_to_earth |
gptkb:true
|
| gptkbp:is_closest_to |
gptkb:Earth
Earth among the three stars |
| gptkbp:is_considered |
a potential host for life
future interstellar missions a potential target for interstellar travel |
| gptkbp:is_considered_as |
potential target for interstellar travel
|
| gptkbp:is_in |
gptkb:the_Milky_Way_galaxy
gptkb:Milky_Way_galaxy the constellation Centaurus the Centaurus constellation the Local Bubble the Orion Arm of the Milky Way the Solar neighborhood |
| gptkbp:is_inhabited_by |
hypothetical life forms
|
| gptkbp:is_known_for |
its variability
its red color its proximity to Earth high stellar activity its low luminosity hosting exoplanets potential habitability of its planets its potential for hosting life hosting potentially habitable exoplanets its potential for hosting exoplanets being a red dwarf star being closest star to the Sun being the closest known star to the Sun being the closest known star to the Sun. flare activity |
| gptkbp:is_known_to |
stellar flares
|
| gptkbp:is_located_at |
4.24 light years from Earth
Declination -62° 40' 46.141 Declination -62° 40' 46.2" RA 14h 29m 42.9487s, Dec -62° 40' 46.145 Right Ascension 14h 29m 42.9487s Right Ascension 14h 29m 42.948s Declination -62° 40' 46.14" Right Ascension 14h 29m 42.948s, Declination -62° 40' 46.2" |
| gptkbp:is_located_in |
gptkb:Centaurus_constellation
gptkb:the_Milky_Way_galaxy gptkb:Milky_Way_Galaxy gptkb:Milky_Way_galaxy constellation Centaurus the constellation Centaurus |
| gptkbp:is_observed_in |
gptkb:ALMA
gptkb:Hubble_Space_Telescope gptkb:VLT telescopes various telescopes radio astronomy |
| gptkbp:is_part_of |
gptkb:Alpha_Centauri_star_system
gptkb:Centauri_system gptkb:stellar_population_III gptkb:Alpha_Centauri_binary_system gptkb:Alpha_Centauri_triple_system gptkb:Alpha_Centauri_system gptkb:interstellar_medium gptkb:astronomy gptkb:the_Milky_Way_galaxy gptkb:Alpha_Centauri_A/_B/_C_system gptkb:star gptkb:Milky_Way_galaxy gptkb:the_Local_Group triple star system multiple star system the Centaurus constellation solar neighborhood the Local Bubble the Galactic Center the solar neighborhood stellar population II the Galactic Halo local stellar neighborhood stellar population I the Galactic Core local group of stars the Milky Way's stellar population the Galactic neighborhood the Orion Arm the Galactic Disk the Alpha Centauri system the Alpha Centauri triple system Galactic neighborhood Alpha Centauri triple star system the Solar neighborhood Alpha Centauri A and B stellar classification M-type the Alpha Centauri triple star system the Galactic Halo. the Galactic Structure |
| gptkbp:is_studied_for |
gptkb:exoplanet
stellar dynamics stellar evolution potential habitability stellar activity habitability potential its planetary system its potential for life |
| gptkbp:is_studied_in |
gptkb:exoplanet
gptkb:astronomy astrophysics |
| gptkbp:is_the_closest_known_star_to |
gptkb:the_Solar_System
|
| gptkbp:is_the_closest_star_to |
gptkb:the_Sun
gptkb:Earth gptkb:the_Solar_System |
| gptkbp:is_the_closest_star_to_earth |
gptkb:Yes
gptkb:true |
| gptkbp:is_the_smallest_star |
in the Alpha Centauri group
|
| gptkbp:is_used_in |
astrophysical models
|
| gptkbp:is_visible_from |
gptkb:Earth
gptkb:true no with a telescope not visible to the naked eye Earth with a telescope only with a telescope |
| gptkbp:known_as |
gptkb:Alpha_Centauri_C
|
| gptkbp:lighting |
gptkb:Alpha_Centauri_B
gptkb:Alpha_Centauri_A |
| gptkbp:mass |
0.12 solar masses
0.122 solar masses approximately 0.12 solar masses 0.123 solar masses |
| gptkbp:metallicity |
-0.5 dex
|
| gptkbp:notable_feature |
Closest known star to the Sun
closest known star to the Sun |
| gptkbp:orbital_inclination |
not applicable
90 degrees < 1 degree < 90 degrees |
| gptkbp:orbital_period |
1.5 years
11.2 Earth days 5.2 Earth days 11.2 days 550,000 years 5.2 years 5.2 days 11.2 days for Proxima Centauri b 5.11 days for Proxima Centauri c |
| gptkbp:originated_in |
gptkb:the_Solar_System
|
| gptkbp:right_ascension |
14h 29m 42.9487s
|
| gptkbp:rotation_period |
about 11 days
approximately 11 days 83 days about 83 days |
| gptkbp:scientific_classification |
M-type star
|
| gptkbp:speed |
59 km/s
65 km/s |
| gptkbp:surface |
10.44 m/s²
0.5 g 0.56 g 0.3 g 0.2 g approximately 0.1 g |
| gptkbp:targets |
gptkb:exoplanet
SETI projects |
| gptkbp:type |
gptkb:red_dwarf_star
gptkb:Dwarves M-type red dwarf |
| gptkbp:type_of |
gptkb:Dwarves
M-type red dwarf M-type red dwarf star |
| gptkbp:was_affecting |
stellar dynamics in Alpha Centauri system
|
| gptkbp:bfsParent |
gptkb:Dim_Stars
gptkb:Alpha_Centauri_star_system gptkb:the_GTVA gptkb:Alpha_Centauri gptkb:Alpha_Centauri_system gptkb:Bright_Star gptkb:Flare_Star |
| gptkbp:bfsLayer |
5
|