Ascendant sign and degree from local sidereal time.
R = retrograde
The Lagna (Ascendant) is the zodiac sign rising on the eastern horizon at the moment of birth. It moves through all twelve signs in about 24 hours — roughly one sign every two hours — so birth time precision matters more for the Lagna than for almost anything else in the chart.
The Lagna, or ascendant, is the zodiac sign and degree rising on the eastern horizon at the moment of birth. It sets the first house of the chart, and therefore the house position of every planet.
The Lagna advances about one degree every four minutes, completing all twelve signs in roughly 24 hours. A birth time that is off by two hours will usually give the wrong rising sign entirely.
The Rāśi (Moon sign) and Nakshatra calculators are far more forgiving, since the Moon moves about 13° a day rather than 360°. A chart cast without a reliable birth time should not be read for house-based conclusions.