Magnitude

2023-07-22T09:19:25Z

GuentherWuchterl: /* Artikel zur Magnitude */

Die Magnitude eines Gestirnes ist ein Konzept zur Klassifikation und zur Quantifizierung für dessen Helligkeit.

Sie wird auch als ''Größenklasse'' oder ''Größe'' bezeichnet.

Sie ist ein traditionelles Maß für die "Helligkeit" von Gestirnen. Es geht auf die Antike zurück (Sternkatalog des Ptolmaios ca 150 uZ der wiederum wesentlich auf Hipparch basiert) und "numeriert" die Sterne grob nach ihrem Auftauchen in der Dämmerung. Damit haben hellere
Sterne niedrigere Nummern. Im 20 Jh. wurde das konzept verallgemeinert und ähnelt nun dem Bel oder Dezibels aus der Schalldruckmessung
mit dem wesentlichen Unterschied dass 1 Bel einem Faktor 10 enstpricht, aber 5 Magnituden einem Faktor Hundert und eine Magnitude
der 5. Wurzel aus 100 (100^1/5 ~ 2,51... . Wegen der Nähe zum natürlichen Logarithmus entsprechen kleine Magnitudendifferenzen nahezu
Relativzahlen, zB 0,1 mag etwa einem Faktor 0,1 oder 10%.

Die IAU empfiehlt die Nutzung von SI-Einheiten zur Angabe von Leuchtdichten, [https://www.iau.org/static/resolutions/IAU2015_English.pdf stellt aber fest das Magnituden weiter verwendet würden (Schlussabsatz)].

Wichtig ist die Angabe des Wellenlängenbereiches oder Frequenzbereiches ("Farbe") die der Magnitudenangabe zugrunde liegt. Die IAU
empfiehlt diese Angabe als Subskript zur Kurzbezeichnung ''mag'' hinzuzufügen, als "mag_vis" für die visuelle Angabe, "mag_V" für
das V-Filter des Johnson-Systems oder G für die GAIA-Fotometrie.

[https://www.iau.org/static/resolutions/IAU2015_English.pdf IAU 2015 Resolutionen B1, B2: Verbindung der (bolometrischen) Magnitude mit der Sonne]

[https://www.iau.org/static/resolutions/IAU2015_English.pdf IAU 2015 Resolution B2 - Definition der Magnitude M_bol]

--[[User:GuentherWuchterl|GW]] ([[User talk:GuentherWuchterl|talk]]) 11:34, 22 July 2023 (CEST)

=Artikel zur Magnitude=

[https://lweb.cfa.harvard.edu/~dfabricant/huchra/ay145/mags.html Astronomical Magnitude Systems], Original Author: Gregory D. Wirth
Department of Physics & Astronomy University of Victoria, Modified by J. Huchra (CfA)

[http://www.stjarnhimlen.se/comp/radfaq.html Magnituden, Photometrie und Radiometery] auf [http://www.stjarnhimlen.se/comp/radfaq.html Radiometry and photometry in astronomy By Paul Schlyter, Stockholm, Sweden]

Heliometer

2023-07-18T14:36:05Z

GuentherWuchterl: /* Bunte Doppesterne */

=== "de Ball's" Stern ===

TYC 1151-630-1 ca 1°46' w-lich 36 Peg
5,3' WNW von TYC 1151-630-1 22 36 22.88272 +08 58 58.4117 11.290

2022-02: nahe Sichtbarkeitsgrenze; nicht detektiert > 15 mag_V (a7III)

=== de Balls Asteroid (230) Athamantis ===
* Oppo: 19. Okt

=== Bunte Doppesterne ===

Spica Spektro 2 x B7 4d
Mizar 20d first known spectro
Υ Vir 2,76 2 x F0V ~2"
ι UMa (yellow, A7V, 3,12 mag_V) mit doppeltem M-Begleiter (0,7", 10 mag_V, purple) bei 4,5"
Dubhe 0,7" B: 4-10 mag_V
η CrB 2x G2V 5,2 mg_V ~1"
α CrB spectro 17d Eclipse 1/10 mag_V

Procyon B A 0,35, B; 10,8 4,5"

Groombridge 1830 UMa Δmag=2 1,7" PA 166 1°-511 a
Lalande 21185 6,4 mag_V π 0,395" comp 1/100 M_Sonne 1,7" 7,6 mag_V

WDS Discovr Comp EPO CH # THETA RHO Magnitudes Spectral Prop Mot 2nd PM DM Desig Note Precise
Identifier Frst Last Fst Lst First Last Pri Sec Type RA" DEC" RA" DEC" Coordinate

11037+6145 BU 1077 AB 1889 2017 83 326 342 0,9 0,8 2,02 4,9 5 G9III -119 -67 62 1161 NO 110343.84+614504.0 Dubhe
11037+6145 BU 1077 AC 1800 2020 15 205 206 384 384,5 2,02 7,1 9 G9III -119 -67 -117 -66 N 110343.84+614504.0 Dubhe

16294-2626 GNT 1 1847 2019 149 273 277 2,6 2,7 0,96 5,4 M1 -10 -20 -26 11359 NO 162924.47-262555.0 α Sco

13347-0036 HNK 7 2004 2010 9 145 154 1,8 1,8 3,4 10 A3V+M4/7V -277 45 0 3076 N 133441.59-003544.9 ς Vir
17465+2743 STF2220 A,BC 1781 2016 121 240 249 18 35,4 3,49 9,7 8 G5IV+M2V -292 -750 -343 -744 27 2888 NV 174627.51+274314.3 µ¹ Her
08468+0625 SP 1 AB 1888 2021 274 142 324 0,2 0,1 3,5 5,6 G1III+A8V -228 -44 6 2036 NO 084646.51+062507.7 ε Hya
22150+5703 MWT 1 Aa,Ab 2008 2010 2 84 90 0,4 0,3 3,5 7,8 F0IV+M0 482 46 N K 221502.19+570236.8 ε Cep
10200+1950 STF1424 BC 1877 1998 9 293 288 232,6 327,4 3,64 9,6 4 G5III+M4V 306 -161 -499 -43 20 2465 NU 101958.62+195026.7 Υ Leo

02507+5554 STF 307 AB 1779 2018 58 290 301 26 28,7 3,76 8,5 0 M3I+B9V 16 -14 16 -14 55 714 NT 025041.81+555343.8 η Per
20136+4644 WRH 33 Aa,Ab 1949 1985 6 140 111 0,1 0 3,93 . K4Ib+B3V 4 3 46 2882 NO 201337.90+464428.8 31 Cyg EB
02442+4914 STF 296 AB 1782 2020 85 290 306 13,5 21,2 4,16 10 F7V+M1.5 335 -90 336 -84 48 746 NO V 024411.99+491342.4 Θ Her
22467+1210 HJ 301 AB 1825 2016 31 120 94 11 11 4,2 12,4 F7V+M2V 234 -492 234 -492 11 4875 NV 224641.58+121022.4 ξ Peg
13473+1727 STT 270 AB 1825 2017 70 345 76 22,5 1,5 4,5 11,1 F6IV+M2V -482 41 18 2782 NO 134715.74+172724.8 τ Boo

12442+5146 RDR 5 2003 2018 9 243 281 1,3 2,3 4,78 8,9 7 K3+K3+M5 -379 -184 52 1650 N K 124414.54+514533.4 HIP 62145
00162-7951 CVN 14 2002 2016 7 355 352 3,9 4 4,86 9,9 G8V+M4V 434 -58 -80 9 N K 001612.67-795104.2 HIP 1292

00180-1327 LLO 2 2001 2002 2 87 87 1,3 1,4 4,99 7,8 G0V+M2V 396 -1 -14 42 V K 001758.87-132720.3

[http://www.astro.gsu.edu/wds/ Daten aus dem Washington Double Star Catalogue (WDS)]

=WDS Infos=

... Kopie von [http://www.astro.gsu.edu/wds/Webtextfiles/wdsweb_format.txt Current WDS Formt]

WDS BIBLE

COLUMN Format DATA
-------- ------ ----------------------------
1 - 10 A10 2000 Coordinates
11 - 17 A7 Discoverer & Number
18 - 22 A5 Components
24 - 27 I4 Date (first)
29 - 32 I4 Date (last)
34 - 37 I4 Number of Observations (up to 9999)
39 - 41 I3 Position Angle (first - XXX)
43 - 45 I3 Position Angle (last - XXX)
47 - 51 F5.1 Separation (first)
53 - 57 F5.1 Separation (last)
59 - 63 F5.2 Magnitude of First Component
65 - 69 F5.2 Magnitude of Second Component
71 - 79 A9 Spectral Type (Primary/Secondary)
81 - 84 I4 Primary Proper Motion (RA)
85 - 88 I4 Primary Proper Motion (Dec)
90 - 93 I4 Secondary Proper Motion (RA)
94 - 97 I4 Secondary Proper Motion (Dec)
99 - 106 A8 Durchmusterung Number
108 - 111 A4 Notes
113 - 130 A18 2000 arcsecond coordinates

Description of Data in the WDS

Columns 1- 10: The hours, minutes, and tenths of minutes of Right
Ascension for 2000, followed by the degrees and minutes of
Declination for 2000, with + and - indicating north and
south declinations. The positions given represent our best
estimates of these values. Where possible, these are based
on the ACRS and PPM data, with proper motion incorporated.

Columns 11- 17: The discoverer, identified by his one-to-three letter code,
and his discoverer's number, if assigned. The reference list
should be consulted first to identify individuals. However,
some discoverer designations do not appear in this list, for
various reasons, and a supplementary list is provided.

Columns 18- 22: Components, when the object has more than two. The Lick IDS
scheme has been discontinued, and components are now
referred to by the traditionally employed lower-case
letters. The rather awkward upper-case designations, e.g.
ABXC, have been changed to the form AB-C, etc. We have noted
some confusion on the part of observers and students alike,
as to how to designate components in multiple systems.
Traditionally, these have been designated in order of
separation, thus AB, AC,...., or in the cases where close
pairs are observed blended, AB-C, AB-D,.... In some
instances, differing resolution limits produce situations
where observations are intermixed, thus AC, AB-C, and so
forth (in all too many cases, carelessness on the part of
the observer does not permit us to determine with certainty
how the observation is to be interpreted). There are also
many instances where later observations have revealed a
closer companion; these are designated Aa, Bb, etc. In a few
cases wider, later discoveries have also been so denoted.

Columns 24- 27: The dates of the first and last observations of an object
29- 32: (of satisfactory accuracy), up to the present date.

Columns 34- 37: The number of measures of the object.

Columns 39- 41: Position angles in degrees for the dates listed in columns
43- 45: 26-34. Crude positions (e.g., NP) of the past have been
changed to their degree equivalent with an accompanying note
in the data line of the measurement database. Position
angles are unprecessed in this catalog (i.e., they are for
the mean date of observation).

Columns 47- 51: The distances in seconds of arc, and tenths, for the dates
53- 57: listed in columns 26-34. Some separations are treated by the
codes found in columns 100-101, or in the Notes.

Columns 59- 63: Magnitudes of the two components. See the Introduction for
65- 69: discussion.

Columns 71- 79: Spectral type of A, or of two components, if space permits.
See the Introduction for discussion.

Columns 81- 84: The components of the proper motion in seconds of arc per
85- 88: 1000 years, in right ascension reduced to great circle, and
in declination. Specifically, this catalog lists 15mu(alpha)
cos(delta), where mu(alpha) is in seconds of time, and
mu(delta) is in seconds of arc. Both quantities are reduced
to a time unit of 1000 years. The exceptions are those
objects coded P for which an explanation is given under the
description for Columns 108 to 111. + and - indicate
eastward and westward motions in Right Ascension, and + and
- those north and south in Declination. Where possible, this
comes from Tycho-2.

Columns 90- 93: Proper motion of the secondary, when known.
94- 97:

Columns 99-106: Durchmusterung number of the object in the system used by
the Henry Draper Catalogue: Bonn from +89 degrees to -22
degrees inclusive, Cordoba from -23 degrees to -51 degrees
inclusive, Cape Photographic from -52 degrees to -89
degrees inclusive. When a star is not contained in the
Durchmusterung proper to its declination zone, but is
contained in another Durchmusterung, this is so indicated
in the Notes. Other components having different
Durchmusterung numbers are also indicated in the Notes.

Columns 108-111: The following codes are contained in these columns:

N: Notes found in the Notes table.
B: Summary line gives blue (Johnson U or B, blue
photographic, etc.) magnitudes
C: Orbit and Linear solution. A published orbit exists
and this system has a Linear Solution as well. A "C"
code, then, indicates both an "O" and an "L" code.
I: Identification uncertain. Match of object at precise
position with WDS pair may or may not be correct.
Currently under examination.
K: Summary line gives K-band or other infrared (>1
micron) magnitudes
L: Linear solution. Linear elements for this pair have
been determined. Linear Elements Catalog is
currently under devlopement.
M: Magnitude modified. Magnitudes have been corrected
to the Tycho-V scale based on other systems measured
by the discoverer and Tycho.
N: Notes found in WDSNOT MEMO of WDS
O: Orbit, briefly described in WDSNOT MEMO and has
entry in Orbit Catalog
P: 100-year proper motion in right ascension and
declination
R: Summary line gives red (Johnson R or I, red
photographic, etc.) magnitudes
S: Statistically different parallax and proper motion
indicates that this pair is non-physical.
T: Statistically the same parallax within the errors and
similar proper motion or other technique indicates
that this pair is physical.
U: Proper motion or other technique indicates that this
pair is non-physical.
V: Proper motion or other technique indicates that this
pair is physical.
W: System has additional components and/or measures in
the WDS Supplement (WDSS) catalog.
X: A "Dubious Double" (or "Bogus Binary"). This pair may
represent a positional typo in the original publication
(so we're looking in the wrong location), an optical
double disappearing due to radically different proper
motions, a plate flaw, or simply a pair not at a
magnitude, separation, etc., sufficiently similar to
those noted when the first measure was added (making
it too faint, too close, etc.). We would certainly like
to know about any circumstances where you have found or
have ascertained the mystery behind these pairs.
Y: Statistically different parallax for the components
indicates they are non-physical.
Z: Statistically the same parallax within the errors would
indicate the components are physical.

At present, column 108 is reserved for N, column 109 for
O, L, C, or X and column 110 for W. The other codes can
occur in any column.

Columns 113-130: The hours, minutes, seconds and tenths of seconds (when
known) of Right Ascension for 2000, followed by the degrees,
minutes, and seconds of Declination for 2000, with + and -
indicating north and south declinations. The positions given
represent our best estimates of these values. Where
possible, these are based on the Hipparcos and Tycho data,
with proper motion incorporated. While the arcminute
coordinate (columns 1-10) refer to the primary of a multiple
system, the arcsecond coordinate (columns 113-130) refer to
the primary of the subsystem. For example, while the BC pair
of an A-BC multiple will have the same 10 digit WDS
coordinate, the arcsecond coordinate of the BC pair will be
at the "B" position.

PLATO - Mercury-Test

2023-06-19T12:54:51Z

GuentherWuchterl: /* Juli = */

[https://mercurytest.plato-planets.at PLATO Mercury-Test (Website)]

=Auswahl=

== Juli ==

2073.01 PC 9.5 10.0(TYC) ingr 07-03 01:37 0.2 30 326 6.2 0.06 53.2 -10 8.0 UMa 209.88 58.93 13:59:32 58:56.0
TOI-1670 c KP 9.5 9.9 ingr 07-10 21:09 0.2 66 357 5.3 0.59 40.7 -15 8.2 Dra 259.02 72.16 17:16:04 72:09.7
TOI-1670 c KP 9.5 9.9 cent 07-10 23:48 0.2 59 335 5.3 0.59 40.7 -19 8.2 Dra 259.02 72.16 17:16:04 72:09.7

==Juni 2023==

1897.01 PC 10.1 ? egre 06-22 01:26 0.2 43 20 6.7 6.22 48.5 -11 7.9 Cas 48.37 75.27 3:13:29 75:16.1 alerted as a single; matches depth of additional transits at ~2729 and 2923 TBJD; likely 48.5 d EB with .01 as primaries and .02 as secondaries
Name Typ mag_T mag_v phase Time +/- h Az D d Peri h_So Vis Con RA J2000 Dec RA J2000 Dec Comment start
[No=TOI] [i/c/e] [UTC] [h] [°] [°] [h] [%] [d] [°] [h] [IAU] [°] [°] [H:M:S] [d:m.m]
------------------------------------------------------------------------------------------------------------------------------------
Kepler-20 d KP 12.1 12.5 egre 06-24 21:25 0.2 63 88 7.1 0.07 77.6 -16 7.9 Lyr 287.70 42.34 19:10:48 42:20.3
2277.01 PC 8.0 ? cent 06-24 22:36 1.4 57 1 12.4 0.02 102.0 -18 7.9 Dra 273.50 80.66 18:13:59 80:39.5 Single transit candidate at TBJD~2000. Other events are likely systematic.

hms.sternhell.at - New pages [en-gb]

Magnitude

Heliometer

PLATO - Mercury-Test