Statements (61)
| Predicate | Object |
|---|---|
| gptkbp:instance_of |
gptkb:star
|
| gptkbp:age |
7-10 billion years
|
| gptkbp:apparent_magnitude |
5.21
+8.5 |
| gptkbp:astrometric_measurements |
key to understanding motion.
|
| gptkbp:average_temperature |
4,800 K
|
| gptkbp:common_name |
gptkb:61_Cygni
61 Cygni system |
| gptkbp:constellation |
gptkb:Cygnus
|
| gptkbp:contains_star |
61 Cygni A and 61 Cygni B.
K-type. Milky Way. |
| gptkbp:coordinates |
(X, Y, Z)
(X, Y, Z) = (0.1, 0.2, 0.3) kpc |
| gptkbp:declination |
+38° 44′ 57″
|
| gptkbp:discovered_by |
1834
|
| gptkbp:discovery |
astrometry
|
| gptkbp:discovery_year |
1804
|
| gptkbp:distance |
11.4 light years
parallax method. |
| gptkbp:distance_from_earth |
11.4 light years.
|
| gptkbp:eccentricity |
0.5
|
| gptkbp:has_color |
1.1
+0.9 |
| gptkbp:has_companion |
gptkb:61_Cygni_B
|
| gptkbp:has_luminosity |
0.4 solar luminosities
binary interaction. main-sequence stars. |
| gptkbp:has_mechanic |
0.6 arcseconds/year
-0.5, -0.1 arcseconds/year |
| gptkbp:has_spectral_type |
K5 V
|
| gptkbp:historical_significance |
first star to have its parallax measured.
|
| https://www.w3.org/2000/01/rdf-schema#label |
61 Cygni
|
| gptkbp:is_known_for |
proximity to Earth
|
| gptkbp:is_located_in |
constellation Cygnus
|
| gptkbp:is_part_of |
gptkb:Milky_Way
solar neighborhood |
| gptkbp:is_used_in |
stellar navigation
|
| gptkbp:is_visible_from |
yes
naked eye |
| gptkbp:lighting |
variable.
one of the brightest stars in Cygnus. |
| gptkbp:movement |
moving towards the Solar System.
|
| gptkbp:notable_feature |
one of the closest stars to Earth.
|
| gptkbp:orbital_period |
650 years
|
| gptkbp:research |
telescopes.
observed by Friedrich Wilhelm Bessel. requires precise measurements. used for studying composition. |
| gptkbp:research_interest |
astrophysics.
|
| gptkbp:right_ascension |
21h 06m 53.2s
|
| gptkbp:semi_major_axis |
40 AU
|
| gptkbp:significance |
important for understanding stellar distances.
|
| gptkbp:speed |
-20.0 km/s
|
| gptkbp:stellar_parameters |
mass, luminosity, temperature.
|
| gptkbp:stellar_system |
binary system.
|
| gptkbp:storage |
used for brightness measurements.
|
| gptkbp:system |
yes
|
| gptkbp:title |
61 Cyg.
|
| gptkbp:travel_time |
11.4 years.
|
| gptkbp:type |
gptkb:star
|