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(meteorobs) More questions please.
More questions please.
1. NAMN Fireball Reporting Form
When filling out "APPARENT PATH:" on the NAMN Fireball Reporting Form:
-one way is to describe "BEGIN" and "END" in terms of Right Ascension
(hours) and Declination (degrees) which are coordinates from a celestial map.
Right?
-another way to describe "BEGIN" and "END" is in terms of AZIMUTH
(degrees, north = 0 or 360, and south= 180), and ELEVATION. How is ELEVATION
in this circumstance determined? Is it horizon = zero (0) degrees and zenith
= 90 degrees?
Is there something like an overlay map that will help beginners learn both
these coordinating systems to then be able to transfer from one system to the
other? I take it you all use only celestial map coordinates, yes? no?
Neither of these systems are used for reporting meteors, right? Only radiant
and sporadic designations, right?
2. Star/Planet Magnitude
If Jupiter is a visual (to me) magnitude -3 right now, does that mean it
changes and one should not take the listing in the NAMN guide, Chapter 2:
Observing Technique-Visual, page 5, as an absolute on brightness/magnitude?
I found a used book, A Concise Guide in Colour, Constellations, by Josef
Klepesta and Antonin Rukl, 1978, that among other things has magnitudes
listed for major stars in constellations. Can I go by these listings? Is
there a similar listing for planets (or do they change during the year)? Are
the numbers on some of the charts on "NAMN: Limiting Magnitude Charts" (lm)
actually magnitudes that indicate brightness from an observers view?
Mrs. Webb
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