Statements (146)
| Predicate | Object |
|---|---|
| gptkbp:instance_of |
gptkb:galaxy
|
| gptkbp:apparent_magnitude |
7.86
|
| gptkbp:body_shape |
gptkb:active_galactic_nucleus
no yes |
| gptkbp:contains |
gptkb:supernova_remnants
H II regions |
| gptkbp:contains_star |
gptkb:NGC_5455
gptkb:Ursa_Major_II_group gptkb:M101-3 gptkb:NGC_5474 gptkb:M101-2 yes HII regions over 100 billion stars M101-1 M101-4 M101-5 100 billion stars |
| gptkbp:current_club |
no
|
| gptkbp:declination |
54° 20′ 00″
|
| gptkbp:diameter |
170,000 light years
170,000 light-years |
| gptkbp:discovered_by |
gptkb:Pierre_Méchain
|
| gptkbp:discovery_year |
1781
|
| gptkbp:distance_from_earth |
21 million light years
21 million light-years |
| gptkbp:emissions_standard |
no
|
| gptkbp:features |
prominent spiral arms
|
| gptkbp:foot |
yes
multiple spiral arms |
| gptkbp:has |
active star formation
multiple satellite galaxies a complex structure a bright nucleus a prominent dust lane a high surface brightness multiple bright star clusters |
| gptkbp:has_color |
B-V = 0.65
U-B = -0.10 R-I = 0.15 V-R = 0.25 |
| gptkbp:has_dust_lane |
yes
|
| gptkbp:has_hiiregion |
gptkb:NGC_5455
gptkb:NGC_5462 |
| gptkbp:has_historical_significance |
yes
|
| gptkbp:has_luminosity |
1.2 × 10^10 L☉
|
| gptkbp:has_notable_galactic_interactions |
with NGC 5455
with NGC 5461 with NGC 5474 |
| gptkbp:has_open_clusters |
yes
|
| gptkbp:has_supernova |
gptkb:SN_2020jfo
gptkb:SN_2004dj gptkb:SN_1994_I gptkb:SN_1994ae gptkb:SN_2011dh SN 2020tlf |
| https://www.w3.org/2000/01/rdf-schema#label |
Messier 101
|
| gptkbp:is |
visible in small telescopes
often studied in astrophysics a site of ongoing research a subject of many photographs a galaxy that has been observed for its stellar populations a galaxy that exhibits gravitational interactions a galaxy that has been mapped in detail a galaxy that has been studied for its morphology a galaxy with a high star formation rate a popular target for amateur astronomers a prominent feature in the night sky often compared to the Milky Way a galaxy that has been observed in various wavelengths a reference point for distance measurements a popular subject in astrophotography a target for deep-sky imaging a galaxy that has been studied for its chemical composition often included in astronomy textbooks a galaxy with a significant amount of dark matter a galaxy with a rich history of observation a subject of cosmological studies a galaxy that has been analyzed for its dynamics one of the largest galaxies in the local group a galaxy that has been photographed by amateur astronomers a benchmark for spiral galaxies a target for galaxy formation studies a galaxy that has been used to test cosmological models a galaxy that has been included in astronomical surveys a galaxy that has been featured in documentaries a galaxy that has been included in star charts a member of the M101 group of galaxies a galaxy that has been observed for its interstellar medium a galaxy that has been used as a standard candle for distance measurement |
| gptkbp:is_featured_in |
astronomy magazines
|
| gptkbp:is_known_for |
its face-on appearance
|
| gptkbp:is_observed_in |
gptkb:Hubble_Space_Telescope
optical wavelengths X-ray wavelengths radio wavelengths infrared wavelengths |
| gptkbp:is_part_of |
gptkb:M101_Group
gptkb:Laniakea_Supercluster gptkb:New_General_Catalogue gptkb:Local_Group gptkb:Messier_catalog gptkb:Local_Group_of_galaxies gptkb:Virgo_Supercluster Messier 101 group of galaxies |
| gptkbp:is_popular_in |
amateur astronomy
|
| gptkbp:is_studied_for |
galaxy formation
galaxy formation and evolution star formation rates galaxy evolution dark matter distribution |
| gptkbp:is_studied_in |
gptkb:astronomy
|
| gptkbp:is_visible_from |
gptkb:Northern_Hemisphere
yes star charts with amateur telescopes |
| gptkbp:known_as |
gptkb:NGC_5457
gptkb:Pinwheel_Galaxy |
| gptkbp:lighting |
no
yes 23.5 mag/arcsec² |
| gptkbp:located_in |
gptkb:Ursa_Major
constellation Ursa Major Ursa Major constellation |
| gptkbp:mass |
1.5 x 10^11 solar masses
1.5 × 10^11 solar masses |
| gptkbp:metallicity |
Z = 0.02
|
| gptkbp:notable_feature |
prominent dust lanes
multiple spiral arms large central bulge |
| gptkbp:orbit_type |
gptkb:NGC_5455
gptkb:NGC_5461 gptkb:NGC_5474 yes |
| gptkbp:photography |
gptkb:Spitzer_Space_Telescope
gptkb:Chandra_X-ray_Observatory gptkb:Hubble_Space_Telescope |
| gptkbp:redshift |
0.0023
0.0022 |
| gptkbp:right_ascension |
14h 03m 12s
|
| gptkbp:rotation_period |
flat rotation curve
|
| gptkbp:targets |
deep-sky observations
|
| gptkbp:type |
gptkb:spiral_galaxy
|
| gptkbp:bfsParent |
gptkb:Messier_catalog
|
| gptkbp:bfsLayer |
5
|