Milky Way Synchronization
Galactic
One galactic year ≈ 225 Myr. Sol orbits Sagittarius A* at 220 km/s from a radius of 8.122 kpc.
Galactic Orbit
Sol position · top-down spiral
4-arm spiral
◉ SOL · 19.1111%
Galactic Years Elapsed
Since Earth formation
20.191111
Cycle 19.1111 %
Sol Vector
Velocity220 km/s
Radius8.122 kpc
Year225.0 Myr
LSR Δ13.4 km/s
Apexα 18ʰ 28ᵐ
TowardHercules
Sgr A* Star Cluster
46 S-stars · live Keplerian propagation
◉ 46 verified S-stars · Gillessen+ 2017
Sgr A* @ 26,996 ly
Upcoming Apsides
Pericenters & apocenters · next 200 yr
S2 PERI
B0-2 V · q=118 AU
Mar 30, 1970 · 14:44 UTC
1970.22 · in 81d
S55 PERI
B0-2 V · q=246 AU
Dec 17, 1970 · 02:23 UTC
1970.94 · in 342d
S21 APO
— · q=423 AU
Dec 02, 1971 · 12:00 UTC
1971.90 · in 1.9 yr
S4716 APO
B7-8 V · q=470 AU
Dec 11, 1971 · 00:00 UTC
1972.00 · in 2.0 yr
S14 APO
B4-9 V · q=56 AU
May 31, 1972 · 00:28 UTC
1972.47 · in 2.5 yr
S4711 PERI
B8-9 V · q=144 AU
Oct 17, 1972 · 02:23 UTC
1972.85 · in 2.8 yr
S18 APO
— · q=1029 AU
Nov 08, 1972 · 01:26 UTC
1972.91 · in 2.9 yr
S62 PERI
B-type · q=18 AU
Aug 24, 1973 · 22:47 UTC
1973.63 · in 3.6 yr
S4716 PERI
B7-8 V · q=470 AU
Jan 07, 1974 · 00:00 UTC
1974.00 · in 4.0 yr
S38 APO
M III · q=208 AU
May 29, 1974 · 08:24 UTC
1974.39 · in 4.4 yr
S4714 APO
— · q=13 AU
Apr 22, 1975 · 20:23 UTC
1975.29 · in 5.3 yr
S29 APO
— · q=952 AU
Jun 23, 1975 · 21:36 UTC
1975.46 · in 5.5 yr
Sol · Galactic Apsides
Sun's orbit around the Milky Way center · informational
Last Apocenter~7 Myr ago
Next Pericenter~15 Myr
Galactic Year~225 Myr
Cycle Phase19.1111%
Eccentricity~0.07
R perigalactic~7.0 kpc
R apogalactic~9.3 kpc
Vertical osc.~70 Myr
Galactic Calendar
Live true-anomaly · 46 S-stars orbiting Sgr A*
Loading galactic ephemeris…
Sagittarius A*
Central supermassive black hole · GRAVITY 2022
Mass4.30×10⁶ M☉
Distance8,277 pc
Light-yr26,996
Rₛ12.7 Mkm
RA J200017h 45m 40.0409s
Dec J2000-29° 00′ 28.118″
S2 period16.05 yr
ClosestS4714 · 12.6 AU
Cosmic Reference Frame
Sol System4.567 Gyr
Earth4.543 Gyr
Milky Way13.61 Gyr
Universe13.787 Gyr
Local Group~10 Mly
Virgo SC~110 Mly
Laniakea~520 Mly
Observable~93 Gly