OBSERVATORY ALMANAC · NOCTURNAL DISPATCH

Tonight under the Sky

21.13°S, 42.37°WAmerica/Sao_Paulo

Daylight+29.0°

15:46:37

Fri, Oct 23, 2026

PHOTOMETRIC TWILIGHT SPECTRUM8h 42m of true darkness · 11h 16m total night

DaylightCivil (−6°)Nautical (−12°)Astro (−18°)Dark Sky (<−18°)

TRUE DARK SKY WINDOW

Sunset17:55

Civil Dusk18:18

Nautical18:45

Full Dark19:12

Nadir23:33

Dark Ends03:54

Nautical04:21

Civil Dawn04:48

Sunrise05:11

LIVE REAL-TIME OBSERVATION

SunsetSunrise

LOCAL SKY PLANISPHERE · STEREOGRAPHIC PROJECTION

All-Sky Nocturnal Dome

Click any body to inspect telemetry

LUNAR EPHEMERISWaxing Gibbous

ILLUMINATION93%

ALTITUDE1.5°

DISTANCE379,800 km

Moonrise15:37

Moonset03:47

HorizonAbove

LUNAR INTERFERENCE INDEX2% · Minimal Lunar Glare

Sky background remains dark; faint nebulae and distant galaxies are distinct.

ATMOSPHERIC SEEING & CLOUD PROFILETonight's Index

41/100

Fair Stargazing

Partial haze or lunar wash. Bright clusters, double stars, and prominent planets remain well visible.

CLOUD COVER15%

HUMIDITY50%

VISIBILITY18 km

DEW POINT10.8°C

PLANETARY EPHEMERIS & ALMANAC

Visible Planets Tonight

All times calibrated to America/Sao_Paulo

PLANET	STATUS	MAGNITUDE	ALTITUDE	AZIMUTH	CONSTELLATION	RISE	TRANSIT	SET	EQUIPMENT
Venus♀	Visible Low	-4.3	29.1°	261°	Libra	04:57	11:27	17:57	Naked Eye
Jupiter♃	Below Horizon	-2.0	-37.7°	272°	Leo	01:42	07:25	13:04	Naked Eye
Saturn♄	Below Horizon	0.3	-7.9°	92°	Pisces	16:20	22:19	04:23	Naked Eye
Mars♂	Below Horizon	1.0	-46.5°	274°	Cancer	01:15	06:50	12:23	Naked Eye
Mercury☿	Optimal Visibility	0.4	49.2°	262°	Libra	06:16	12:51	19:27	Binoculars
Uranus♅	Below Horizon	5.6	-63.3°	85°	Taurus	20:23	01:51	07:22	Binoculars
Neptune♆	Below Horizon	7.8	-0.3°	91°	Pisces	15:48	21:50	03:56	Telescope

TONIGHT'S VIEWING SCHEDULE

When & Where to Look Tonight

A simple guide to when each object is above your horizon. No astronomy chart reading required.

BEST TIMEHighest in your sky

The MoonNaked Eye · High in the sky

RISES15:37

BEST TIME21:45N · 65° high

SETS03:47

Reaches about 65° above the horizon at its highest point.Waxing Gibbous (93% illuminated). Minimal Lunar Glare.

JupiterNaked Eye · High in the sky

RISES01:42

BEST TIME07:25N · 55° high

SETS13:04

Reaches about 55° above the horizon at its highest point.Bright golden disc; four Galilean moons easily seen in 7x50 binoculars.

SaturnNaked Eye · High in the sky

RISES16:20

BEST TIME22:19N · 68° high

SETS04:23

Reaches about 68° above the horizon at its highest point.Pale amber jewel; majestic ring system visible in any 60mm telescope.

VenusNaked Eye · High in the sky

RISES04:57

BEST TIME11:27N · 87° high

SETS17:57

Reaches about 87° above the horizon at its highest point.Brilliant dazzling beacon; visible crescent phase in small telescope.

MarsNaked Eye · High in the sky

RISES01:15

BEST TIME06:50N · 51° high

SETS12:23

Reaches about 51° above the horizon at its highest point.Distinctive crimson hue; polar ice cap discernible near opposition.

OBSERVING LOG & TARGET LIST

Tonight's Prime Deep-Sky Targets

0 / 6 targets logged tonight

M31 / NGC 224 · Andromeda

Andromeda Galaxy

Spiral Galaxy (2.5M ly)

Our galactic neighbor; visible as a ghostly oval smudge with dense radiant stellar core.

M45 · Taurus

The Pleiades (Seven Sisters)

Open Star Cluster

Breathtaking blue diamond cluster enshrouded in delicate interstellar reflection nebulosity.

M42 / NGC 1976 · Orion

Great Orion Nebula

Diffuse Emission Nebula

Star nursery harboring the brilliant Trapezium cluster with sprawling bat-wing filaments.

NGC 869 & NGC 884 · Perseus

The Double Cluster

Twin Open Clusters

Pair of spectacular shimmering jewel-boxes bursting with ruby supergiant stars.

M13 / NGC 6205 · Hercules

Great Globular Cluster in Hercules

Globular Cluster (300k stars)

Massive beehive of ancient stars packed tightly together into a blazing central ball.

M57 / NGC 6720 · Lyra

The Ring Nebula

Planetary Nebula

Delicate glowing smoke-ring left behind by a dying star 2,500 light-years away.