* Margaret Tudor's birth was recorded in the Beaufort Book of Hours, a royal family chronicle inherited by Henry VIII’s grandmother, Lady Margaret Beaufort (after whom Margaret was named). According to the Book, Margaret Tudor was born "at Westminster at night after the ninth hour a quarter."
Margaret's Ascendant was in Leo, the sign of royalty, and she had Neptune-Mars and her North Node in a Leo decan in the 5th, the royal house.
Upon her marriage to James IV, she became Queen of Scotland.
WIKIPEDIA BLURB
Margaret Tudor (28 November 1489 – 18 October 1541), born at Westminster Palace, was the elder of the two surviving daughters of Henry VII of England and Elizabeth of York, and the elder sister of Henry VIII. In 1503, she married James IV, King of Scots. James died in 1513, and their son became King James V. She married secondly Archibald Douglas, 6th Earl of Angus. Through her first and second marriages, respectively, Margaret was the grandmother of both Mary, Queen of Scots, and Mary's second husband, Lord Darnley. Margaret's marriage to James IV foreshadowed the Union of the Crowns - their great-grandson, King James VI of Scotland, the child of Mary and Darnley, became King of England and Ireland on the death of Margaret's fraternal niece, Elizabeth I of England.
Read more from her Wikipedia biography.
NATAL DATA and ASTROLOGY CHART
BIRTH DATA: 28 November 1489 [OS], 21:15 (9:15 p.m.) LAT (-0:06:34), Westminster, England (51n30, 0w09).
ASC: 20 Leo.
RR: AA (from family chronicle).
SOURCE: Sy Scholfield (©) quotes The Beaufort Book of Hours, inherited by Henry VIII’s grandmother, Lady Margaret Beaufort, which states that Margaret was born "at Westminster at night after the ninth hour a quarter" on 28 November 1489 [Julian Calendar].
http://www.bl.uk/onlinegallery/onlineex/henryviii/birthaccdeath/beaufort.
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* Wikipedia gives at least two different dates of birth for 
