28 Cygni
type: Thing
description: binary star system in the constellation Cygnus
additional property: PropertyValue
  property ID: P31
  value: Be-type star
additional property: PropertyValue
  property ID: P31
  value: near-infrared source
additional property: PropertyValue
  property ID: P31
  value: pulsating variable star
additional property: PropertyValue
  property ID: P59
  value: Cygnus
additional property: PropertyValue
  property ID: P215
  value: B2.5V
additional property: PropertyValue
  property ID: P528
  value: HD 191610
additional property: PropertyValue
  property ID: P528
  value: HIP 99303
additional property: PropertyValue
  property ID: P528
  value: SAO 69518
additional property: PropertyValue
  property ID: P646
  value: /m/0lq1zp_
additional property: PropertyValue
  property ID: P881
  value: SX Arietis variable
additional property: PropertyValue
  property ID: P1215
  value: +4.03
additional property: PropertyValue
  property ID: P1215
  value: +4.80
additional property: PropertyValue
  property ID: P1215
  value: +4.93
additional property: PropertyValue
  property ID: P1457
  value: -2.56
additional property: PropertyValue
  property ID: P2120
  value: +5.7
additional property: PropertyValue
  property ID: P2214
  value: +3.8921
additional property: PropertyValue
  property ID: P2216
  value: -7.90
additional property: PropertyValue
  property ID: P2583
  value: +256.931
additional property: PropertyValue
  property ID: P3083
  value: * b02 Cyg
additional property: PropertyValue
  property ID: P4296
  value: +320
additional property: PropertyValue
  property ID: P6257
  value: +302.35674608797
additional property: PropertyValue
  property ID: P6258
  value: +36.839620544
additional property: PropertyValue
  property ID: P6259
  value: J2000.0
additional property: PropertyValue
  property ID: P6879
  value: +18836
additional property: PropertyValue
  property ID: P7015
  value: +10000
additional property: PropertyValue
  property ID: P10751
  value: +13.168
additional property: PropertyValue
  property ID: P10752
  value: +2.739
additional property: PropertyValue
  property ID: P13228
  value: 2059262344012317312
confidence:
  popularity graph score:
    score: 0.006
    score pct: 1
    tier: established
    components:
      sitelinks: 6
      sitelinks norm: 0.014
      unique citations: 9
      unique citations norm: 0.004
      monthly pageviews: 25
      monthly pageviews norm: 0.0
  sitelinks: 6
  unique citations: 9
  monthly pageviews: 25
  yearly pageviews: 51
  pageview trend:
    m: 2026-08
    v: 25
  pageview trend:
    m: 2026-07
    v: 3
  pageview trend:
    m: 2026-06
    v: 5
  pageview trend:
    m: 2026-05
    v: 2
  pageview trend:
    m: 2026-05
    v: 2
  pageview trend:
    m: 2026-05
    v: 1
  pageview trend:
    m: 2026-04
    v: 2
  pageview trend:
    m: 2026-04
    v: 11
  popularity:
    sitelinks: 6
    max: 423
    pct: 1.4
  tier: established
claims:
  P31:
    value: Q812800
    source count: 1
    confidence: 0.2
    value label: Be-type star
  P31:
    value: Q67206785
    source count: 1
    confidence: 0.2
    value label: near-infrared source
  P31:
    value: Q353834
    source count: 1
    confidence: 0.2
    value label: pulsating variable star
  P31:
    value: Q71798788
    source count: 1
    confidence: 0.2
    value label: ultraviolet source
  P31:
    value: Q523
    source count: 0
    confidence: 0.0
    value label: star
  P59:
    value: Q8921
    source count: 1
    confidence: 0.2
    value label: Cygnus
  P215:
    value: B2.5V
    source count: 1
    confidence: 0.2
  P528:
    value: HD 191610
    source count: 1
    confidence: 0.2
  P528:
    value: HIP 99303
    source count: 1
    confidence: 0.2
  P528:
    value: SAO 69518
    source count: 1
    confidence: 0.2
  P528:
    value: HR 7708
    source count: 1
    confidence: 0.2
  P528:
    value: IRAS 20075+3641
    source count: 1
    confidence: 0.2
  P646:
    value: /m/0lq1zp_
    source count: 0
    confidence: 0.0
  P881:
    value: Q1392904
    source count: 1
    confidence: 0.2
    value label: SX Arietis variable
  P1215:
    value:
      amount: +4.03
    source count: 1
    confidence: 0.2
  P1215:
    value:
      amount: +4.80
    source count: 1
    confidence: 0.2

value:
  amount: +4.93
source count: 1
confidence: 0.2

value:
  amount: +5.071
source count: 1
confidence: 0.2

value:
  amount: +5.155
source count: 1
confidence: 0.2

value:
  amount: -2.56
source count: 1
confidence: 0.2

value:
  unit: Q48440
  amount: +5.7
source count: 1
confidence: 0.2

value:
  unit: Q21500224
  amount: +3.8921
source count: 1
confidence: 0.2

value:
  unit: Q3674704
  amount: -7.90
source count: 1
confidence: 0.2

value:
  unit: Q12129
  amount: +256.931
source count: 1
confidence: 0.2

value: * b02 Cyg
source count: 1
confidence: 0.2

value:
  unit: Q3674704
  amount: +320
source count: 1
confidence: 0.2

value:
  unit: Q28390
  amount: +302.35674608797
source count: 1
confidence: 0.2

value:
  unit: Q28390
  amount: +36.839620544
source count: 1
confidence: 0.2

value: Q1264450
source count: 2
confidence: 0.4
value label: J2000.0

value:
  unit: Q11579
  amount: +18836
source count: 1
confidence: 0.2

value:
  unit: Q39699418
  amount: +10000
source count: 1
confidence: 0.2

value:
  unit: Q22137107
  amount: +13.168
source count: 1
confidence: 0.2

value:
  unit: Q22137107
  amount: +2.739
source count: 1
confidence: 0.2

value: 2059262344012317312
source count: 0
confidence: 0.0

source: SIMBAD
stated in qid: Q654724

source: The kinematics of the Gould belt: an expanding group ?
stated in qid: Q66617079

source: Catalogue of Stellar Photometry in Johnson's 11-color system
stated in qid: Q63881058

source: VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
stated in qid: Q66309067

source: Gaia Early Data Release 3
stated in qid: Q98668919

source: Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system
stated in qid: Q54126358

source: TESS observations of Be stars: a new interpretation
stated in qid: Q112161746

source: Gaia Data Release 2
stated in qid: Q51905050

source: High and intermediate-resolution spectroscopy of Be stars. An atlas of Hγ, He I 4471 and Mg II 4481 lines
stated in qid: Q66424492

wikidata id: Q4632717
domain: be_type_star
level: standard
html url: https://4ort.xyz/entity/28-cygni
markdown url: https://4ort.xyz/entity/28-cygni.md
facts url summary: https://4ort.xyz/entity/28-cygni/facts.json
facts url standard: https://4ort.xyz/entity/28-cygni/facts.json
facts url full: https://4ort.xyz/entity/28-cygni/facts.json
data source: Wikidata (CC0 / public domain)
license: https://creativecommons.org/publicdomain/zero/1.0/
api version: v1
served at: 2026-08-26T03:06:51.098376Z
entity updated at: 2026-05-03T21:19:00.258443+00:00Z
entity created at: 2026-04-10T23:16:54.068442+00:00Z