The closing degrees of a sign
At noon in every year from 1930 to 2035 the Sun on this date has stood between about twenty six and twenty seven and a half degrees of Scorpio. Since the Sun covers roughly one degree a day, that is about three days of travel before Sagittarius opens, and the sign has never been anything else on this date in the span.
Late degrees are sometimes treated as though a sign were running out of strength there, which is not how the geometry works. A placement at twenty seven degrees is inside the sign exactly as fully as one at seven. What the degree governs is aspects and house placement, both of which depend on the arc rather than on the label.
It is also worth noting where the sign began. Scorpio opened around 23 October, so a birth on this date came about four weeks into it, and the earlier boundary is far enough behind to be irrelevant in any year.
Where the argument actually starts
Sagittarius begins when the Sun reaches two hundred and forty degrees of longitude. That moment falls on 21, 22 or 23 November depending on the year, and it drifts about six hours later each year before jumping back when February gains a leap day. Printed tables have to name one date, so different tables name different ones, and the disagreement is entirely theirs rather than the sky's.
That is why anyone born in the last few days of the month has probably been given both signs at different times. Three days earlier the question does not arise: no reasonable error in a birth time or a time zone can move a position at twenty seven degrees across a boundary three degrees away.
It is worth being clear that there is no blended state near the line either. The Sun occupies one longitude at any instant, and that longitude lies inside one sign.
The band, which is the live distinction here
Since the sign is settled, the subdivision that separates one Scorpio birthday from another is the ten degree band. This position is in the last of them, from twenty to thirty degrees, which the Chaldean order assigns to Venus. The sign around it belongs to Mars in the older scheme and to Pluto in the modern one.
The reading passed down is the sign's persistence attached to something particular rather than held generally. A second scheme, built on element and sign order, gives this band to Cancer and therefore to the Moon, and both versions circulate widely. Either way the material is inherited convention rather than measurement, which is how it should be read.
What still needs a clock and a city
The Sun is the one placement a calendar date fixes on its own, which is precisely why it is quoted everywhere. The Moon covers about half a sign in a day, so on this date it can be in either of two signs depending on the hour of birth, with no pattern across years worth memorising. The rising sign turns through the whole zodiac in twenty four hours and depends on the latitude of the birthplace as well as the clock time.
The widget above takes a year, a time and a place and returns the exact solar degree in place of the century-wide window, the Moon and rising signs, and the measured gap to the nearest sign boundary. On this date that gap is comfortable, which is worth confirming once given how much argument surrounds the days that follow.
Questions people ask about this
Is 19 November Scorpio or Sagittarius?
Scorpio, in every year from 1930 to 2035 and at any hour. The Sun is around twenty seven degrees along, roughly three days of solar travel from the boundary.
Why do the sign dates disagree at the end of November?
Because the boundary genuinely falls on 21, 22 or 23 November depending on the year. A printed table has to pick one date, so different tables pick differently.
What degree is the Sun on this date?
Between about twenty six and twenty seven and a half degrees of Scorpio at noon across the last century. The widget above narrows that to a single figure.
Does a high degree mean the sign is weaker?
No. Membership of a sign is not graded. A Sun at twenty seven degrees is as much in Scorpio as one at two, and the degree governs aspects rather than belonging.
Which decan does 19 November fall in?
The closing band of Scorpio, twenty to thirty degrees. The Chaldean order assigns it to Venus and the triplicity scheme to the Moon.
Do I need my birth time?
Not for the sign or the band on this date. For the Moon, usually yes, since it can change sign within a day. For the rising sign and the houses, always, plus the birthplace.