Talk:Q308

deletion of "unknown" value in discovery statements

@Infovarius: I agree that is unknown the date and author of discovery, same as thousand of astronomic objects or some other properties that are empty because are unknown by now. Are you going to fill with unknown any information that we do not know of all of them ?. If so, let me know, elsewere, please accept deletion because of singular situation for this planet. To have this "no information" means complicate the systems that fetch them with a double validation. Thanks, --Amadalvarez (talk) 16:37, 17 April 2021 (UTC)

@Amadalvarez: I just want to have some completeness in a table like this:

SELECT ?item ?itemLabel ?date ?pionerLabel WHERE {
  ?item wdt:P31/wdt:P279* wd:Q13205267.
        OPTIONAL {?item wdt:P575 ?date.}
  OPTIONAL {?item wdt:P61 ?pioner.}
  SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
}

Try it!

(Though now it's not). It's up to you if remove or keep these claims. --Infovarius (talk) 22:30, 18 April 2021 (UTC)

@Infovarius: Thanks for fill this items. Actually, I'm filling physical and orbital characteristics in astronomical items in order to migrate manual data infoboxes to a new one full WD powered. The discussion is not about your work, but "criteria of what to do" when there is no information. This is an old debate that I think was closed in false. Even Help:Statements, one of the most basic guidelines for all editors, but specially for beginners, describes "unknown" with not updated concepts: "We could also say that William Shakespeare (Q692) has an unknown value for the date of birth (P569) property.", and "Unknown value may also mean the value is actually a known object, but there's currently no Wikidata item about the object.". These incongruents descriptions may cause funny situations as Q302#P1304 or Q302#P1884; could you image someone filling with "unknown" this so specífic properties for milions of Q5 items we have ?.

I mean that we are not going to solve this general missunderstanding here, in this talk, nor I'll start a edition war with you, obviously. But if you known another debate or/and consolidated criteria, please let me know, or we couild try to open a serious debate within community. Thanks, Amadalvarez (talk) 06:57, 19 April 2021 (UTC)

Funny that there's some related discussion at Wikidata:Project chat#Important negative statements about Wikidata entities. --Infovarius (talk) 19:18, 20 April 2021 (UTC)

Right ascension and declination

RA and Decl is the position of an astronomical object on the celestial globe. mercury does not have a fixed position, the RA and Decl values in wikidata is the position of the celestial north pole of mercury, not of Mercury proper. Hans Erren (talk) 14:55, 19 November 2021 (UTC)