Statements (66)
| Predicate | Object |
|---|---|
| gptkbp:instance_of |
gptkb:star
|
| gptkbp:age |
gptkb:Sun
1.5 billion years approximately 2 billion years |
| gptkbp:apparent_magnitude |
4.4
4.38 |
| gptkbp:average_temperature |
approximately 5,200 K
|
| gptkbp:country |
gptkb:none
|
| gptkbp:discovered_by |
gptkb:unknown
1970s |
| gptkbp:distance |
16.5 light years
16.4 light years |
| gptkbp:eccentricity |
0.5
|
| gptkbp:exhibition |
gptkb:Henry_Draper_catalog
Hipparcos catalog Gliese catalog |
| gptkbp:has_color |
0.6
+0.9 |
| gptkbp:has_historical_significance |
gptkb:true
|
| gptkbp:has_luminosity |
approximately 0.4 solar luminosities
|
| gptkbp:has_mechanic |
-0.1, -0.2 arcseconds/year
-0.12, -0.15 arcseconds/year |
| gptkbp:has_spectral_type |
K1 V
|
| gptkbp:has_title |
40 Ophiuchi A and B
|
| https://www.w3.org/2000/01/rdf-schema#label |
40 Ophiuchi
|
| gptkbp:is_associated_with |
exoplanet studies
|
| gptkbp:is_known_for |
binary star characteristics
|
| gptkbp:is_located_at |
Declination -24° 22′ 00″
Right Ascension 16h 23m 59s |
| gptkbp:is_located_in |
gptkb:Milky_Way_Galaxy
|
| gptkbp:is_notable_for |
its proximity to Earth
its binary nature its low luminosity being a binary star system being a K-type star |
| gptkbp:is_observed_in |
space telescopes
infrared astronomy ground-based telescopes |
| gptkbp:is_part_of |
stellar evolution research
stellar population studies local stellar group solar neighborhood constellation Ophiuchus stellar classification studies stellar associations stellar catalogues astrophysical surveys local stellar population exoplanetary system studies |
| gptkbp:is_similar_to |
gptkb:Alpha_Centauri
|
| gptkbp:is_studied_for |
stellar dynamics
|
| gptkbp:is_studied_in |
gptkb:exoplanet
astrophysics |
| gptkbp:is_used_in |
astrophysical models
stellar evolution studies stellar evolution models stellar formation theories |
| gptkbp:is_visible_from |
gptkb:Earth
gptkb:true northern hemisphere |
| gptkbp:metallicity |
-0.2 dex
|
| gptkbp:orbital_period |
100 years
approximately 100 years |
| gptkbp:parallax |
0.2 arcseconds
|
| gptkbp:speed |
-20 km/s
|
| gptkbp:system |
gptkb:true
|