Magnitudes a simple vista de dia

[desper]

Cuantas magnitudes disminuye un astro en el cielo azul del dia?

Hago la pregunta, porque sabemos que el limite de magnitud a simple vista en la noche es 6.

Pero en el dia cual sera el limite ?

En estos momentos durante la noche, venus tiene una magnitud de -4,6

Pero durante el dia? cual es la magnitud? debe tener una magnitud inferior a 6, porque es visible a simple vista.

Pero el resto de los planetas y estrella son invisibles, deben tener una magnitud superior a 6.

[desper]

He investigado en varias web y encontre una tabla de magnitudes que dice que el limite de magnitud aparente para ver un astro en pleno dia a simple vista es -3.9

[desper]

La tabla de magnitudes tambien dice que la magnitud limite con el sol por debajo de los 10 grados sobre el horizonte es -2.50

Jupiter seria visible en ese momento, solamente en el orto y ocaso del sol.

En cambio Venus si podria ser visible a cualquier hora del dia.

[Alejandro Quilez]

La verdad desper, nos pillas un poco out con esa pregunta, nos preocupamos mas de ver las magnitudes pero por la noche cuando observamos.

Aunque es interesante saber cual es la magnitud limite, me imagino que variara con las horas del dia, mayor luz solar o menor.

[desper]

Aqui esta la tabla de magnitudes, lo malo esta en ingles, pero busquen un traductor

-38.00 Rigel as seen from 1 astronomical unit. It is seen as a large very bright bluish scorching ball of 35° apparent diameter.
-30.40 Sun as seen from 1566 Icarus at perihelion
-30.30 Sirius as seen from 1 astronomical unit
-29.30 Sun as seen from Mercury at perihelion
-27.40 Sun as seen from Venus at perihelion
-26.74 Sun [4] (398,359 times brighter than mean full moon)
-25.60 Sun as seen from Mars at aphelion
-23.00 Sun as seen from Jupiter at aphelion
-21.70 Sun as seen from Saturn at aphelion
-20.20 Sun as seen from Uranus at aphelion
-19.30 Sun as seen from Neptune
-18.20 Sun as seen from Pluto at aphelion
-16.70 Sun as seen from Eris at aphelion
-12.92 Maximum brightness of Full Moon (mean is -12.74) [3]
-11.20 Sun as seen from Sedna at aphelion
-10.00 Sun as seen from scattered disc object 2006 SQ372 at aphelion
-9.50 Maximum brightness of an Iridium (satellite) flare
-8.30 Sun as seen from Comet Hyakutake at aphelion
-7.50 The SN 1006 supernova of AD 1006, the brightest stellar event in recorded history [5]
-6.50 The total integrated magnitude of the night sky as seen from Earth
-6.00 The Crab Supernova (SN 1054) of AD 1054 (6500 light years away) [6]
-4.89 Maximum brightness of both Venus [7] when illuminated as a crescent and also the International Space Station (when the ISS is at its perigee and fully lit by the sun) [8]
-3.90 Faintest objects observable during the day with naked eye when Sun is high
-3.82 Minimum brightness of Venus when it is on the far side of the Sun
-2.94 Maximum brightness of Jupiter [9]
-2.91 Maximum brightness of Mars [10]
-2.50 Faintest objects visible during the day with naked eye when Sun is less than 10° above the horizon
-2.50 Minimum brightness of Moon when near the sun (New Moon)
-2.45 Maximum brightness of Mercury at superior conjunction (unlike Venus, Mercury is at its brightest when on the far side of the Sun)
-1.61 Minimum brightness of Jupiter
-1.47 Brightest star (except for the sun) at visible wavelengths: Sirius [11]
-0.83 Eta Carinae apparent brightness as a supernova impostor in April 1843
-0.72 Second-brightest star: Canopus [12]
-0.49 Maximum brightness of Saturn at opposition and when the rings are full open (2003, 2018)
-0.27 The combined magnitude for the Alpha Centauri star system
-0.04 Third-brightest star: Arcturus [13]
0.03 Vega, which was originally chosen as a definition of the zero point [14]
0.50 Sun as seen from Alpha Centauri
1.47 Minimum brightness of Saturn
1.84 Minimum brightness of Mars
3.03 The SN 1987A supernova in the Large Magellanic Cloud 160,000 light-years away.
3 to 4 Faintest stars visible in an urban neighborhood with naked eye
3.44 The well known Andromeda Galaxy (M31) [15]
4.38 Maximum brightness of Ganymede [16] (moon of Jupiter and the largest moon in the solar system)
4.50 M41, an open cluster that may have been seen by Aristotle [17]
5.14 Maximum brightness of brightest asteroid Vesta
5.32 Maximum brightness of Uranus [18]
5.72 The spiral galaxy M33, which is used as a test for naked eye seeing under dark skies [19] [20]
5.73 Minimum brightness of Mercury
5.8 Peak visual magnitude of gamma ray burst GRB 080319B (the "Clarke Event") seen on Earth on March 19, 2008 from a distance of 7.5 gigalight-years.
5.95 Minimum brightness of Uranus
6.40 Maximum brightness of asteroid Pallas
6.50 Approximate limit of stars observed by a mean naked eye observer under very good conditions. There are about 9,500 stars visible to mag 6.5. [21]
6.73 Maximum brightness of dwarf planet Ceres in the asteroid belt
6.75 Maximum brightness of asteroid Iris
6.90 The spiral galaxy M81 is an extreme naked eye target that pushes human eyesight and the Bortle Dark-Sky Scale to the limit [22]
7 to 8 Extreme naked eye limit with class 1 Bortle Dark-Sky Scale, the darkest skies available on Earth [23]
7.72 The star HD 85828 [24] is the faintest star known to be observed with the naked eye [25]
7.78 Maximum brightness of Neptune [26]
8.02 Minimum brightness of Neptune
8.10 Maximum brightness of Titan (largest moon of Saturn), [27] [28] mean opposition magnitude 8.4 [29]
9.01 Maximum brightness of asteroid 10 Hygiea [30]
9.50 Faintest objects visible using common 7x50 binoculars under typical conditions
10.20 Maximum brightness of Iapetus [28] (brightest when west of Saturn and takes 40 days to switch sides)
12.00 Sun as seen from Rigel
12.91 Brightest quasar 3C 273 (luminosity distance of 2.4 Giga-light years)
13.42 Maximum brightness of Triton [29]
13.65 Maximum brightness of Pluto [31] (725 times fainter than magnitude 6.5 naked eye skies)
15.40 Maximum brightness of centaur Chiron [32]
15.55 Maximum brightness of Charon (the large moon of Pluto)
16.80 Current opposition brightness of Makemake [33]
17.27 Current opposition brightness of Haumea [34]
18.70 Current opposition brightness of Eris
20.70 Callirrhoe (small ~8 km satellite of Jupiter) [29]
22.00 Approximate limiting magnitude of a 24" Ritchey-Chrétien telescope with 30 minutes of stacked images (6 subframes at 300s each) using a ccd detector [35]
22.91 Maximum brightness of Pluto's moon Hydra
23.38 Maximum brightness of Pluto's moon Nix
24.80 Amateur picture with greatest magnitude -Quasar (CFHQS J1641 +3755)(Cooperation with Ken Crawford) [36]
25.00 Fenrir (small ~4 km satellite of Saturn) [37]
27.00 Faintest objects observable in visible light with 8m ground-based telescopes
28.00 Jupiter if it were located 5000AU from the Sun [38]
28.20 Halley's Comet in 2003 when it was 28AU from the Sun [39]
29.30 Sun as seen from Andromeda Galaxy
31.50 Faintest objects observable in visible light with Hubble Space Telescope
35.00 Sedna at aphelion (900 AU)
35.00 LBV 1806-20 is a luminous blue variable star at visible wavelengths
36.00 Faintest objects observable in visible light with E-ELT

[DonQuijote]

¿Y Quien Quiere ver Las Estrellas de Día?, ESO Parr Esperar Nuestro Sol. : Mrgreen: y no es Que se VEA, es Que No Se le PUEDE Mirar Directamente los Pecados Instrumentos y Las prevenciones adecuadas. [URL = [URL = [url = http://www.fobos.es/seguridad.htm] [http://www.fobos.es/seguridad.htm / url]] [http://www.fobos. es / seguridad.htm / url] [] = [url = http://www.fobos.es] http://www.fobos.es [/ url] / http://www.fobos [seguridad.htm .es /] seguridad.htm / url] [/ url]

Las magnitudes de las Estrellas es El Hijo de cielo oscuro, Con Sol en sí no Ingenuo, no al Servicio Que se le Pongan ANU gafas de Sol al Sol: lol:

Lo unico Que se ve de "Día" Hijo de la Luna y Los Planetas Que reflejan la luz del Sol y en solitario en Las Posiciones adecuadas conditions y, yy Estós El Resto de los astros celestes Sí empiezan Una versión en El Ocaso y Dejan Sí de ver segun amanece.

Salu2 y no desesperes  (Publicado Por: Desesperado)
 : Salu2:

[desper]

He leido que cuando betelgeuse explote como supernova va a llegar a magnitud -12

[Telescopio]

Pues cuando el Sol se haga enana blanca, no veas lo bien que se va a ver...  

[JordiCS]

Pues cuando el Sol se haga enana blanca, no veas lo bien que se va a ver...  

Si seguimos como especie viva, sería impresionante verla.