Haversine Calculator

Angular-separation Calculator for 2 objects on Celestial Sphere

Haversine Calculator
RA1: h m s	RA2: h m s	RAd1: 00.0000 RAd2: 00.0000
DEC1: ° ' "	DEC2: ° ' "	DECd1: 00.0000 DECd2: 00.0000
∠ Separation (dd):	∠ separation (° ' "):

Enter RA and DEC values for 2 objects on the celestial sphere. If object is South DEC, check the checkbox. Click the Sep ∠ button.
The starter and default values are RA/DEC values for Betelgeuse (RA1, DEC1) and Sirius (RA2, DEC2).
The checkbox for Sirius is checked since Sirius is at a south declination.

Parameters

RA1 Right Ascension 1 (hr min sec)
DEC1 Declination 1 (° ' " )
RA2 Right Ascension 2 (hr min sec)
DEC2 Declination 2 (° ' " )
RAd1 / RAd2 Right Ascensions in decimal ° units
DECd1 / DECd2 Declinations in decimal ° units

Advanced Haversine Calculator

References:
1: Reference Systems (NASA)
2: Haversine Formula (Wikipedia)