TOI-561
Sign in to saveTOI-561 is an old, metal-poor, Sun-like star, known to have multiple small planets. It is an orange dwarf, estimated to be 10.5 billion years old, and about 79% the mass and 85% the radius of the Sun. It is located in the constellation Sextans, near the border with Leo.
In the Vinony graph
Vinony's link graph records 161 inbound references to TOI-561, and connects out to year, Sextans and Sun.
It sits within the topics G-type main-sequence stars, Planetary systems with four confirmed planets and Sextans.
Vinony links it to 5 Wikipedia language editions.
Wikidata facts
- Constellation
- Sextans
- Distance from Earth
- 86.01
- Radius
- 0.832
- Mass
- 0.805
Show 12 more facts
- right ascension
- 148.18562153651000
- epoch
- J2000.0
- declination
- 6.21636693339000
- parallax
- 11.93
- right ascension component of proper motion
- -108.432
- declination component of proper motion
- -61.511
- apparent magnitude
- 10.065
- radial velocity
- 79.54
- catalog code
- Gaia DR2 3850421005290172416
- age estimated by a dating method
- 10
- effective temperature
- 5326
- Commons category
- TOI-561
via Wikidata · CC0
~7 min read
Encyclopedic overview
7 sectionsContents
- Discovery and nomenclature
- Characteristics
- Planetary system
- TOI-561 b
- TOI-561 c
- TOI-561 d/e/f
- References
TOI-561 is an old, metal-poor, Sun-like star, known to have multiple small planets. It is an orange dwarf, estimated to be 10.5 billion years old, and about 79% the mass and 85% the radius of the Sun. It is located in the constellation Sextans, near the border with Leo.
In January 2021, a team led by Lauren Weiss of the University of Hawaii at Manoa announced that, using data from NASA's Transiting Exoplanet Survey Satellite, they had found a Super-Earth in a very close orbit, as well as two outer Sub-Neptunes. The innermost planet, TOI-561 b, orbits in under one Earth day. Another team led by Gaia Lacedelli of the University of Padua independently announced the discovery in a paper published in December 2020. However, the two papers disagree on the structure of the system. While the innermost two planets were confirmed from data by both papers, Weiss proposes only a single third planet in a 16.3-day orbit, while Lacedelli argues that the system instead contains two further planets, in wider orbits of 25.6 and 77 days.
Excerpted from Wikipedia’s “TOI-561” article, available under the CC BY-SA 4.0 licence.