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758:– In my experience this star is usually termed "82 Eridani" rather than the more pedantic "82 G. Eridani". To me the insistence on the "G." form seems quite odd. Certainly SIMBAD lists it as "82 Eri" and the references list there contains papers using "82 Eri" or "82 Eridani" in the title and none with the "G." form.
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The article never makes this clear. One scientist speculating about a 5% chance does not represent scientific consensus, nor is it very clear. Is it within the generally theorized habitable zone or not? If not, is it in the theorized border range of a habitable planet? If so what are the specifics?
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Has luminosity value been reported in a journal or other reliable published source? If so, use the published value and cite the publication. I don't think it's necessarily good practice to add original research by doing calculations and entering them into WP articles.
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Might as well do this - here's a table summarizing the history of detections in this system. Only two planets are clearly confirmed, usually called b & d. Currently, the outer candidate discussed above is the only other one that seems likely.
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We assert that the 40 day planet HD 20794 c published in Pepe et al. (2011) is due to stellar activity and not a
Keplerian signal as its statistical significance has not increased despite the addition of hundreds of new precise RV data
677:{\displaystyle {\begin{aligned}{\frac {L}{L_{sun}}}&=\left({\frac {R}{R_{sun}}}\right)^{2}\left({\frac {T_{eff}}{T_{sun}}}\right)^{4}\\&=0.92^{2}\left({\frac {5,401}{5,778}}\right)^{4}=0.65\end{aligned}}}
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I would consider the minimum requirements for creation of a separate article on this object to be a second source confirming its existence, and a consensus on its designation, neither of which currently exist.
928:
so far), and this name also isn't used by any source - the system is commonly referred to as 82 Eridani or HD 20794, not Gliese 139, and the "d" designation refers to a different planet in most sources.
466:), then I'd like to recommend putting in a cite for the formula and show the calculation. That way we know what numbers you used, and we can change the result when the estimates are revised. For example:
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3 planets it's been found around HD20794 (82 Eridani): The HARPS search for Earth-like planets in the habitable zone: I -- Very low-mass planets around HD20794, HD85512 and HD192310
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True but in practice the two systems seem to have merged (at least in this case), and while the G. may be more correct, Knowledge (XXG) prefers general usage to correctness.
1221:"Doppler Constraints on Planetary Companions to Nearby Sun-like Stars: An Archival Radial Velocity Survey of Southern Targets for Proposed NASA Direct Imaging Missions"
924:. I'm redirecting it to here, since this planet isn't clearly confirmed (there are different models of the system in different sources, and this planet only appears in
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936:, much of the article's content is speculation about habitability based on sources not specifically about this planet. This belongs in one of the articles about
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Pepe, F.; et al. (2011), "The HARPS search for Earth-like planets in the habitable zone: I – Very low-mass planets around HD20794, HD85512 and HD192310",
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Cretignier, M.; Dumusque, X.; et al. (August 2023). "YARARA V2: Reaching sub-m s precision over a decade using PCA on line-by-line radial velocities".
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I think it is preferred practice to use a value from a published source. If that is not available and there's a consensus to use a calculation (per
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Let me be clearer, the L=0.62 is all that is necessary even if the figure comes from a paper that illustrates the calculation with a formula.
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Feng, F.; Tuomi, M.; Jones, H.R.A. (September 2017). "Evidence for at least three planet candidates orbiting HD 20794".
887:
Subsequent comments should be made in a new section on this talk page. No further edits should be made to this section.
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Subsequent comments should be made in a new section on the talk page. No further edits should be made to this section.
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is not a reference, even if the formula is known, the unpublished results makes it original research.
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This article on a possible planet in the 82 Eridani system was recently created by
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Pages within the scope of WikiProject
Astronomical objects (WP Astronomy Banner)
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Several sources suggest this star has an infrared excess, which may indicate a
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The following discussion is an archived discussion of the proposal.
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Significant non-detection, rejected as a false positive. Page 44:
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The above discussion is preserved as an archive of the proposal.
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Laliotis, Katherine; Burt, Jennifer A.; et al. (April 2023).
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On 24 September 2012, it was proposed that this article be
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220:. However, beyond that I haven't found much data.—
1328:Non-detection, but not considered a refutation.
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773:) 12:23, 12 October 2012 (UTC)
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120:Template:WikiProject Astronomy
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954:17:37, 24 November 2023 (UTC)
940:, if it's not already there.
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159:This article is supported by
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1118:Astronomy & Astrophysics
740:16:48, 19 October 2012 (UTC)
702:23:06, 10 January 2012 (UTC)
457:22:56, 10 January 2012 (UTC)
444:22:50, 10 January 2012 (UTC)
281:16:52, 2 November 2011 (UTC)
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1199:10.1051/0004-6361/201730406
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260:01:00, 18 August 2011 (UTC)
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1169:Astronomy and Astrophysics
979:82 Eri (HD 20794) planets
143:project's importance scale
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232:22:32, 5 April 2010 (UTC)
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1258:10.3847/1538-3881/acc067
1226:The Astronomical Journal
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718:Please do not modify it.
1296:2023A&A...678A...2C
1191:2017A&A...605A.103F
1140:2011A&A...534A..58P
938:planetary habitability
932:Also, as mentioned at
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1175:(103): 11.
830:it's not a
828:Weak Oppose
449:24.79.40.48
436:24.79.40.48
218:debris disk
212:Debris disk
1369:Categories
1287:2308.11812
1240:2302.10310
1233:(4): 176.
1182:1705.05124
1104:References
1053:c, 89.6 d
1032:c, 43.2 d?
1023:b, 18.3 d
1002:g, 11.9 d?
926:one source
870:Discussion
755:82 Eridani
199:82 Eridani
1311:261076243
1206:119084078
1131:1108.3447
1097:d, 645 d
1076:f, 331 d?
1050:d, 89.8 d
1047:d, 88.9 d
1044:d, 90.3 d
1028:c, 40.1 d
1020:b, 18.3 d
1017:b, 18.3 d
1014:b, 18.3 d
114:Astronomy
109:Astronomy
59:Astronomy
1155:15088852
1061:e, 147 d
813:. Since
763:Relisted
273:AstroCog
248:unsigned
1356:points.
1292:Bibcode
1245:Bibcode
1187:Bibcode
1136:Bibcode
1124:: A58,
767:Jenks24
464:WP:CALC
141:on the
30:C-class
1280:: A2.
789:Survey
417:where
36:scale.
1308:S2CID
1282:arXiv
1235:arXiv
1203:S2CID
1177:arXiv
1152:S2CID
1126:arXiv
959:Table
838:. --
195:moved
993:C23
970:talk
950:talk
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810:~~~~
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730:. --
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197:to
133:Low
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521:R
516:(
511:=
500:n
497:u
494:s
490:L
486:L
451:(
438:(
427:T
423:R
419:L
403:4
398:)
391:n
388:u
385:s
381:T
375:f
372:f
369:e
365:T
359:(
352:2
347:)
340:n
337:u
334:s
330:R
326:R
321:(
316:=
309:n
306:u
303:s
299:L
295:L
275:(
254:(
224:(
205:.
169:.
145:.
42::
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