Planetary conjunction
- jimhebert
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Planetary conjunction
What is the maximum degrees of separation between 2 planets before they are in conjunction? Is there a formula using RA and Declination or an online calculator that is reliable?
- Thefatkitty
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Re: Planetary conjunction
Mark
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"The Hankmeister" Celestron 8SE, orange tube Vixen made C80, CG4 & AZ-EQ5 mounts.
Too much Towa glass/mirrors.
H/A - PST stage 2 mod with a Baader 90mm ERF on a Celestron XLT 102 (thanks Mike!)
Ca-K - W/O 61mm, Antares 1.6 barlow, Baader 3.8 OD and Ca-K filters with a ZWO ASI174mm.
W/L - C80-HD with Baader 5.0 & 3.8 Solar film, Solar Continuum 7.5nm and UV/IR filters with a Canon EOS 550D.
Oh yeah, and Solar Cycle 25
- jimhebert
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- Baurice
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Re: Planetary conjunction
I thought the official definition was that a conjunction is when two objects have the same RA . This happens at a very exact time. Quite often I photograph "conjunctions" where the RA is about a degree or two different. You can even photograph two planets close together or a planet and bright star with just a phone camera. Here is a recent example:
- jimhebert
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Re: Planetary conjunction
I see. I had read somewhere that if the planets were 8 degrees apart they were considered to be in conjunction. If greater than 8 degrees apart they were not in conjunction. I don't know what the rule is.
- JayTee
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Re: Planetary conjunction
This quote comes directly from the Greenwich Observatory, London, UK. So I would say this is the definitive answer!
"If two objects have the same right ascension or the same ecliptic longitude, they are considered to be in conjunction with one another."
"If two objects have the same right ascension or the same ecliptic longitude, they are considered to be in conjunction with one another."
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Searching the skies since 1966. "I never met a scope I didn't want to keep."
∞ AP Scopes: #1: TPO 6" f/9 RC #2: ES 102 f/7 APO #3: ES 80mm f/6 APO
∞ G&G Scopes: #1: Meade 102mm f/7.8 #2: Bresser 102mm f/4.5
∞ Guide Scopes: 70 & 80mm fracs -- The El Cheapo Bros.
∞ Mounts: iOptron CEM70AG, SW EQ6, Celestron AVX, SLT & GT (Alt-Az), Meade DS2000
∞ Cameras: #1: ZWO ASI294MC Pro #2: 662MC #3: 120MC, Canon T3i, Orion SSAG, WYZE Cam3
∞ Binos: 10X50,11X70,15X70, 25X100
∞ EPs: ES 2": 21mm 100° & 30mm 82° Pentax XW: 7, 10, 14, & 20mm 70°
Searching the skies since 1966. "I never met a scope I didn't want to keep."
- jimhebert
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