Home › Entities › exoplanet › BD-21 397 b

BD-21 397 b

extrasolar planet
Place exoplanet Q119951732
Press Enter · cited answer in seconds

BD-21 397 b

Summary

BD-21 397 b is an exoplanet[1].

Key Facts

  • BD-21 397 b's instance of is recorded as exoplanet[2].
  • BD-21 397 b's constellation is recorded as Cetus[3].
  • BD-21 397 b's parent astronomical body is recorded as BD-210397[4].
  • BD-21 397 b's catalog code is recorded as TIC 268804174b[5].
  • BD-21 397 b's time of discovery or invention is recorded as +2023-06-00T00:00:00Z[6].
  • BD-21 397 b's discovery method is recorded as Doppler spectroscopy[7].
  • BD-21 397 b's orbital eccentricity is recorded as {'unit': '1', 'amount': '+0.1'}[8].
  • BD-21 397 b's orbital inclination is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+33'}[9].
  • BD-21 397 b's M sin i is recorded as {'unit': 'http://www.wikidata.org/entity/Q651336', 'amount': '+0.7'}[10].
  • BD-21 397 b's mass is recorded as {'unit': 'http://www.wikidata.org/entity/Q651336', 'amount': '+4.8'}[11].
  • BD-21 397 b's orbital period is recorded as {'unit': 'http://www.wikidata.org/entity/Q573', 'amount': '+1891'}[12].
  • BD-21 397 b's semi-major axis of an orbit is recorded as {'unit': 'http://www.wikidata.org/entity/Q1811', 'amount': '+2.63'}[13].
  • BD-21 397 b's argument of periapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+305'}[14].
  • BD-21 397 b's Extrasolar Planets Encyclopaedia exoplanet ID is recorded as bd_21_397_b--8700[15].
  • BD-21 397 b's NASA Exoplanet Archive ID is recorded as BD-210397 b[16].
  • BD-21 397 b's right ascension is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '+33.3024198'}[17].
  • BD-21 397 b's declination is recorded as {'unit': 'http://www.wikidata.org/entity/Q28390', 'amount': '-21.1962147'}[18].
  • BD-21 397 b's epoch is recorded as J2000.0[19].
  • BD-21 397 b's time of periapsis is recorded as {'unit': 'http://www.wikidata.org/entity/Q14267', 'amount': '+2456490'}[20].

Body

Designation and Status

BD-21 397 b's instance of is recorded as exoplanet[2].

History and Context

BD-21 397 b's catalog code is recorded as TIC 268804174b[5].

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [2] ↑ . The HARPS search for southern extra-solar planets. XLVII. Five Jupiter-mass planets in long-period orbits, one highly irradiated Neptune, one brown dwarf, and five stellar binaries. wikidata.org.
  2. [3] ↑ . wikidata.org.
  3. [4] ↑ . Extrasolar Planets Encyclopaedia. wikidata.org.
  4. [5] ↑ . Exoplanet Archive. wikidata.org.
  5. [6] ↑ . The HARPS search for southern extra-solar planets. XLVII. Five Jupiter-mass planets in long-period orbits, one highly irradiated Neptune, one brown dwarf, and five stellar binaries. wikidata.org.
  6. [7] ↑ . The HARPS search for southern extra-solar planets. XLVII. Five Jupiter-mass planets in long-period orbits, one highly irradiated Neptune, one brown dwarf, and five stellar binaries. wikidata.org.
  7. [8] ↑ . The HARPS search for southern extra-solar planets. XLVII. Five Jupiter-mass planets in long-period orbits, one highly irradiated Neptune, one brown dwarf, and five stellar binaries. wikidata.org.
  8. [9] ↑ . A multi-technique approach to identifying and/or constraining radial-velocity substellar companions. wikidata.org.
  9. [10] ↑ . Extrasolar Planets Encyclopaedia. wikidata.org.
  10. [11] ↑ . A multi-technique approach to identifying and/or constraining radial-velocity substellar companions. wikidata.org.
  11. [12] ↑ . The HARPS search for southern extra-solar planets. XLVII. Five Jupiter-mass planets in long-period orbits, one highly irradiated Neptune, one brown dwarf, and five stellar binaries. wikidata.org.
  12. [13] ↑ . The HARPS search for southern extra-solar planets. XLVII. Five Jupiter-mass planets in long-period orbits, one highly irradiated Neptune, one brown dwarf, and five stellar binaries. wikidata.org.
  13. [14] ↑ . The HARPS search for southern extra-solar planets. XLVII. Five Jupiter-mass planets in long-period orbits, one highly irradiated Neptune, one brown dwarf, and five stellar binaries. wikidata.org.
  14. [15] ↑ . wikidata.org.
  15. [16] ↑ . wikidata.org.
  16. [17] ↑ . The HARPS search for southern extra-solar planets. XLVII. Five Jupiter-mass planets in long-period orbits, one highly irradiated Neptune, one brown dwarf, and five stellar binaries. wikidata.org.
  17. [18] ↑ . The HARPS search for southern extra-solar planets. XLVII. Five Jupiter-mass planets in long-period orbits, one highly irradiated Neptune, one brown dwarf, and five stellar binaries. wikidata.org.
  18. [19] ↑ . Exoplanet Archive. wikidata.org.
  19. [20] ↑ . Extrasolar Planets Encyclopaedia. wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). BD-21 397 b. Retrieved May 3, 2026, from https://4ort.xyz/entity/bd-21-397-b
MLA “BD-21 397 b.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/bd-21-397-b.
BibTeX @misc{4ortxyz_bd-21-397-b_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{BD-21 397 b}}, year = {2026}, url = {https://4ort.xyz/entity/bd-21-397-b}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): BD-21 397 b — https://4ort.xyz/entity/bd-21-397-b (retrieved 2026-05-03)

Canonical URL: https://4ort.xyz/entity/bd-21-397-b · Last refreshed: