Local Sidereal Time Calculator

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Satellite Orbital Characteristics

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✖Greenwich Sidereal Time (GST) is a concept used in astronomy and celestial navigation to measure the rotation of the Earth relative to the stars.ⓘ Greenwich Sidereal Time [GST]			+10% -10%
✖East Longitude refers to a specific geographical location on the Earth's surface in relation to the prime meridian, which is designated as 0 degrees longitude.ⓘ East Longitude [E_long]			+10% -10%

✖Local Sidereal Time is a concept primarily used in astronomy and celestial navigation. It refers to the time measured with respect to the local meridian and the position of the stars.ⓘ Local Sidereal Time [LST]

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Formula

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Local Sidereal Time

Formula

`"LST" = "GST"+"E"_{"long"}`

Example

`"111°"="96°"+"15°"`

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Local Sidereal Time Solution

STEP 0: Pre-Calculation Summary

Formula Used

Local Sidereal Time = Greenwich Sidereal Time+East Longitude
LST = GST+E_long
This formula uses 3 Variables

Variables Used

Local Sidereal Time - (Measured in Radian) - Local Sidereal Time is a concept primarily used in astronomy and celestial navigation. It refers to the time measured with respect to the local meridian and the position of the stars.
Greenwich Sidereal Time - (Measured in Radian) - Greenwich Sidereal Time (GST) is a concept used in astronomy and celestial navigation to measure the rotation of the Earth relative to the stars.
East Longitude - (Measured in Radian) - East Longitude refers to a specific geographical location on the Earth's surface in relation to the prime meridian, which is designated as 0 degrees longitude.

STEP 1: Convert Input(s) to Base Unit

Greenwich Sidereal Time: 96 Degree --> 1.67551608191424 Radian (Check conversion here)
East Longitude: 15 Degree --> 0.2617993877991 Radian (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

LST = GST+E_long --> 1.67551608191424+0.2617993877991

Evaluating ... ...

LST = 1.93731546971334

STEP 3: Convert Result to Output's Unit

1.93731546971334 Radian -->111 Degree (Check conversion here)

FINAL ANSWER

111 Degree <-- Local Sidereal Time

(Calculation completed in 00.004 seconds)

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Created by Shobhit Dimri

Bipin Tripathi Kumaon Institute of Technology (BTKIT), Dwarahat

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< 16 Satellite Orbital Characteristics Calculators

Position Vector

Go Position Vector = (Major Axis*(1-Eccentricity^2))/(1+Eccentricity*cos(True Anomaly))

Kepler's First Law

Go Eccentricity = sqrt((Semi Major Axis^2-Semi Minor Axis^2))/Semi Major Axis

Mean Anomaly

Go Mean Anomaly = Eccentric Anomaly-Eccentricity*sin(Eccentric Anomaly)

True Anomaly

Go True Anomaly = Mean Anomaly+(2*Eccentricity*sin(Mean Anomaly))

Universal Time

Go Universal Time = (1/24)*(Time in Hour+(Time in Minutes/60)+(Time in Seconds/3600))

Reference Time in Julian Centuries

Go Reference Time = (Julian Day-Julian Day Reference)/Julian Century

Julian Century

Go Julian Century = (Julian Day-Julian Day Reference)/Reference Time

Julian Day

Go Julian Day = (Reference Time*Julian Century)+Julian Day Reference

Nominal Mean Motion

Go Nominal Mean Motion = sqrt([GM.Earth]/Semi Major Axis^3)

Mean Motion of Satellite

Go Mean Motion = sqrt([GM.Earth]/Semi Major Axis^3)

Local Sidereal Time

Go Local Sidereal Time = Greenwich Sidereal Time+East Longitude

Kepler's Third Law

Go Semi Major Axis = ([GM.Earth]/Mean Motion^2)^(1/3)

Range Vector

Go Range Vector = Satellite Radius Vector-[Earth-R]

Orbital Period of Satellite in Minutes

Go Orbital Period in Minutes = 2*pi/Mean Motion

Anomalistic Period

Go Anomalistic Period = (2*pi)/Mean Motion

Universal Time Degree

Go Universal Time Degree = (Universal Time*360)

Local Sidereal Time Formula

Local Sidereal Time = Greenwich Sidereal Time+East Longitude
LST = GST+E_long

What is the use of Sidereal time?

Sidereal time is used by astronomers to determine where a certain heavenly body will appear in our sky at any given time. Star positions are described in terms of declination and right ascension, and right ascension is measured in units of sidereal time.

How to Calculate Local Sidereal Time?

Local Sidereal Time calculator uses Local Sidereal Time = Greenwich Sidereal Time+East Longitude to calculate the Local Sidereal Time, Local Sidereal Time (LST) is the measure of the hour angle of the vernal equinox at a specific location, indicating the position of the Earth relative to the fixed stars, important in astronomy and celestial navigation. Local Sidereal Time is denoted by LST symbol.

How to calculate Local Sidereal Time using this online calculator? To use this online calculator for Local Sidereal Time, enter Greenwich Sidereal Time (GST) & East Longitude (E_long) and hit the calculate button. Here is how the Local Sidereal Time calculation can be explained with given input values -> 6359.832 = 1.67551608191424+0.2617993877991.

FAQ

What is Local Sidereal Time?

Local Sidereal Time (LST) is the measure of the hour angle of the vernal equinox at a specific location, indicating the position of the Earth relative to the fixed stars, important in astronomy and celestial navigation and is represented as LST = GST+E_long or Local Sidereal Time = Greenwich Sidereal Time+East Longitude. Greenwich Sidereal Time (GST) is a concept used in astronomy and celestial navigation to measure the rotation of the Earth relative to the stars & East Longitude refers to a specific geographical location on the Earth's surface in relation to the prime meridian, which is designated as 0 degrees longitude.

How to calculate Local Sidereal Time?

Local Sidereal Time (LST) is the measure of the hour angle of the vernal equinox at a specific location, indicating the position of the Earth relative to the fixed stars, important in astronomy and celestial navigation is calculated using Local Sidereal Time = Greenwich Sidereal Time+East Longitude. To calculate Local Sidereal Time, you need Greenwich Sidereal Time (GST) & East Longitude (E_long). With our tool, you need to enter the respective value for Greenwich Sidereal Time & East Longitude and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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