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Gliese 777 c

{{Short description|Extrasolar planet in the constellation Cygnus}}

{{Infobox planet

| name = Gliese 777 c

| discoverer = Marcy et al.

| discovery_site = United States

| discovered = 24 June 2005

| discovery_method = Doppler spectroscopy

| orbit_ref =

| apsis = astron

| semimajor = {{val|0.1296|0.0017|0.0018|ul=AU}}

| eccentricity = {{val|0.165|0.023|0.024}}

| period = {{val|0.0468647|(14)}} years
(17.12 days)

| time_periastron = {{Val|2455210.27|0.42|fmt=commas}}

| arg_peri = {{Val|323.4|9.2|9.1|ul=deg}}

| semi-amplitude =

| star = Gliese 777 A

| mass = {{val|25.4|15.6|3.5|ul=Earth mass}}

}}

Gliese 777 c, often catalogued as Gliese 777 Ac or simply HD 190360 c, is an extrasolar planet approximately 52 light-years away in the constellation of Cygnus. The planet was discovered orbiting the primary star of the Gliese 777 system in 2005 using the radial velocity method and confirmed in 2009. The planet was once called the "smallest extrasolar planet discovered", but this is currently no longer the case. With a mass just 25 times that of the Earth, the planet is likely a "hot Neptune" planet, a small Jovian planet, or possibly a large terrestrial planet (a super-Earth).

See also

References

{{Reflist|colwidth=30em|refs=

{{cite journal | title=Five New Multicomponent Planetary Systems | last1=Vogt | first1=Steven S. | last2=Butler | first2=R. Paul | last3=Marcy | first3=Geoffrey W. | last4=Fischer | first4=Debra A. | last5=Henry | first5=Gregory W. | last6=Laughlin | first6=Greg | last7=Wright | first7=Jason T. | last8=Johnson | first8=John A. | display-authors=1 | journal=The Astrophysical Journal | volume=632 | issue=1 | pages=638–658 | date=2005 | doi=10.1086/432901 | bibcode=2005ApJ...632..638V | s2cid=16509245 | url=https://authors.library.caltech.edu/36250/1/0004-637X_632_1_638.pdf | access-date=2020-09-03 | archive-date=2018-07-22 | archive-url=https://web.archive.org/web/20180722000634/https://authors.library.caltech.edu/36250/1/0004-637X_632_1_638.pdf | url-status=live }}

{{cite journal | title=Ten New and Updated Multi-planet Systems, and a Survey of Exoplanetary Systems | last1=Wright | first1=J. T. | last2=Upadhyay | first2=S. | last3=Marcy | first3=G. W. | last4=Fischer | first4=D. A. | last5=Ford | first5=Eric B. | last6=Johnson | first6=John Asher | display-authors=1 | journal=The Astrophysical Journal | volume=693 | issue=2 | pages=1084–1099 | date=2009 | arxiv=0812.1582 | bibcode=2009ApJ...693.1084W | doi=10.1088/0004-637X/693/2/1084 | s2cid=18169921 }}

{{cite arXiv|eprint=2505.12563 |last1=Giovinazzi |first1=Mark R. |last2=Blake |first2=Cullen H. |last3=Robertson |first3=Paul |last4=Lin |first4=Andrea S. J. |last5=Gupta |first5=Arvind F. |last6=Mahadevan |first6=Suvrath |last7=Fernandes |first7=Rachel B. |last8=Wright |first8=Jason T. |author9=Daniella Bardalez Gagliuffi |last10=Dong |first10=Jiayin |last11=Fitzmaurice |first11=Evan |last12=Halverson |first12=Samuel |last13=Kanodia |first13=Shubham |last14=Logsdon |first14=Sarah E. |last15=Luhn |first15=Jacob K. |last16=McElwain |first16=Michael W. |last17=Monson |first17=Andy |last18=Ninan |first18=Joe P. |last19=Rajagopal |first19=Jayadev |last20=Roy |first20=Arpita |last21=Schwab |first21=Christian |last22=Stefánsson |first22=Gudmundur |last23=Terrien |first23=Ryan |last24=Eastman |first24=Jason D. |last25=Horner |first25=Jonathan |last26=Plavchan |first26=Peter |last27=Wang |first27=Sharon X. |last28=Wilson |first28=Maurice L. |last29=Wittenmyer |first29=Robert A. |title=The NEID Earth Twin Survey. II. Dynamical Masses in Seven High-acceleration Star Systems |date=2025 |class=astro-ph.EP }}

}}

External links

  • {{cite web |url=http://www.solstation.com/stars2/gl777ab.htm |title=Gl 777 / HR 7670 / BD+29 3872 ABab |accessdate=2008-07-02 |work=SolStation |publisher= |date= |archive-date=2009-02-17 |archive-url=https://web.archive.org/web/20090217151621/http://solstation.com/stars2/gl777ab.htm |url-status=live }}

{{clear}}

{{Gliese 777}}

{{Sky|20|03|37.41|+|29|53|48.50|51.81}}

Category:Cygnus (constellation)

Category:Exoplanets discovered in 2005

Category:Giant planets

Category:Exoplanets detected by radial velocity

Category:Hot Neptunes

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