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Rotation period with respect to distant stars, the sidereal rotation period (compared to Earth's mean Solar days) Synodic rotation period (mean Solar day) Apparent rotational period viewed from Earth Sun [i] 25.379995 days (Carrington rotation) 35 days (high latitude) 25 d 9 h 7 m 11.6 s 35 d ~28 days (equatorial) [2] Mercury: 58.6462 days [3 ...
The sidereal year differs from the solar year, "the period of time required for the ecliptic longitude of the Sun to increase 360 degrees", [2] due to the precession of the equinoxes. The sidereal year is 20 min 24.5 s longer than the mean tropical year at J2000.0 (365.242 190 402 ephemeris days) .
Orbit eccentricity causes the planet/Sun distance to change during the year: The higher is the eccentricity, the higher is the change; Sun rays intensity in various moments of the year changes as the planet/Sun distance changes. Earth eccentricity is very low (0.0167 in a scale from 0 to 1.0000), hence it does not affect so much temperature ...
Three systems are used as frames of reference for tracking planetary rotation, particularly when graphing the motion of atmospheric features. System I applies to latitudes from 7° N to 7° S; its period is the planet's shortest, at 9h 50 m 30.0s. System II applies at latitudes north and south of these; its period is 9h 55 m 40.6s. [136]
Longest orbital period (Longest year) Gliese 900 b (CW2335+0142) Gliese 900: 1.27 million years [60] [1] [f] COCONUTS-2b previously held this record at 1,100,000 years. [f] Shortest orbital period (Shortest year) SDSS J1730+5545 b: SDSS J1730+5545: 0.5866 h (35 minutes) [61] K2-137b has the shortest orbit around a main-sequence star (an M dwarf ...
June features the shortest nights of the year across the Northern Hemisphere, but there will still be plenty to see during the abbreviated periods when the sun is below the horizon -- including a ...
Mercury's sidereal year (88.0 Earth days) and sidereal day (58.65 Earth days) are in a 3:2 ratio. This relationship is called spin–orbit resonance, and sidereal here means "relative to the stars". Consequently, one solar day (sunrise to sunrise) on Mercury lasts for around 176 Earth days: twice the planet's sidereal year.
The shortest day of the year. According to timeanddate.com, the Winter Solstice occurs on Dec. 21 and there will be 10 hours and two minutes of daylight.That's in stark contrast to the Summer ...