OBSERVATORY ALMANAC · NOCTURNAL DISPATCH

Tonight under the Sky

39.87°N, 139.85°EAsia/Tokyo

Deep Astronomical Night-22.2° (< −18°)

04:05:05

Sat, Oct 24, 2026

PHOTOMETRIC TWILIGHT SPECTRUM10h 9m of true darkness · 13h 10m total night

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

TRUE DARK SKY WINDOW

Sunset16:50

Civil Dusk17:18

Nautical17:49

Full Dark18:20

Nadir23:25

Dark Ends04:29

Nautical05:00

Civil Dawn05:32

Sunrise06:00

LIVE REAL-TIME OBSERVATION

SunsetSunrise

LOCAL SKY PLANISPHERE · STEREOGRAPHIC PROJECTION

All-Sky Nocturnal Dome

Click any body to inspect telemetry

LUNAR EPHEMERISWaxing Gibbous

ILLUMINATION93%

ALTITUDE-6.4°

DISTANCE379,731 km

Moonrise15:30

Moonset03:31

HorizonBelow

LUNAR INTERFERENCE INDEX0% · Minimal Lunar Glare

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

ATMOSPHERIC SEEING & CLOUD PROFILETonight's Index

92/100

Exceptional Stargazing

Pristine dark skies with clear transparency. Ideal for astrophotography & faint deep sky targets.

CLOUD COVER15%

HUMIDITY50%

VISIBILITY18 km

DEW POINT10.8°C

PLANETARY EPHEMERIS & ALMANAC

Visible Planets Tonight

All times calibrated to Asia/Tokyo

PLANET	STATUS	MAGNITUDE	ALTITUDE	AZIMUTH	CONSTELLATION	RISE	TRANSIT	SET	EQUIPMENT
Venus♀	Below Horizon	-4.3	-24.7°	93°	Libra	06:16	11:15	16:20	Naked Eye
Jupiter♃	Optimal Visibility	-2.0	41.5°	108°	Leo	00:22	07:14	14:06	Naked Eye
Saturn♄	Rising / Setting	0.3	2.5°	270°	Pisces	16:06	22:13	04:19	Naked Eye
Mars♂	Optimal Visibility	1.0	49.9°	112°	Cancer	23:35	06:40	13:45	Naked Eye
Mercury☿	Below Horizon	0.4	-42.8°	82°	Libra	07:53	12:41	17:32	Binoculars
Uranus♅	Optimal Visibility	5.6	54.5°	248°	Taurus	18:27	01:44	09:01	Binoculars
Neptune♆	Below Horizon	7.8	-4.0°	273°	Pisces	15:38	21:43	03:44	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

RISES15:30

BEST TIME21:13S · 50° high

SETS03:31

Reaches about 50° above the horizon at its highest point.Waxing Gibbous (93% illuminated). Minimal Lunar Glare.

JupiterNaked Eye · High in the sky

RISES00:22

BEST TIME07:14S · 65° high

SETS14:06

Reaches about 65° above the horizon at its highest point.Bright golden disc; four Galilean moons easily seen in 7x50 binoculars.

SaturnNaked Eye · High in the sky

RISES16:06

BEST TIME22:13S · 52° high

SETS04:19

Reaches about 52° above the horizon at its highest point.Pale amber jewel; majestic ring system visible in any 60mm telescope.

VenusNaked Eye · Good height

RISES06:16

BEST TIME11:15S · 32° high

SETS16:20

Reaches about 32° above the horizon at its highest point.Brilliant dazzling beacon; visible crescent phase in small telescope.

MarsNaked Eye · High in the sky

RISES23:35

BEST TIME06:40S · 68° high

SETS13:45

Reaches about 68° 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.