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Proxima Centauri has a relatively large proper motion—moving 3.85 arcseconds per year across the sky. [53] It has a radial velocity towards the Sun of 22.2 km/s. [5] From Proxima Centauri, the Sun would appear as a bright 0.4-magnitude star in the constellation Cassiopeia, similar to that of Achernar or Procyon from Earth. [nb 6]
Distance Spectral type Stellar radius (R ☉) Stellar mass (M ☉) Apparent magnitude (V) Absolute magnitude (V) Notes Sun: 1.58 × 10-5 (149,600,000 km) G2V 1 -26.74 [117] 4.83 [117] The star at the centre of the Solar System. Alpha Centauri A (Rigil Kentaurus) 4.344 ± 0.002: G2V [51] 1.2175 ± 0.0055 [52] 1.0788 ± 0.0029 [52] 0.01 [53] 4.38 ...
The closest system is Alpha Centauri, with Proxima Centauri as the closest star in that system, at 4.2465 light-years from Earth. The brightest, most massive and most luminous object among those 131 is Sirius A , which is also the brightest star in Earth's night sky ; its white dwarf companion Sirius B is the hottest object among them.
Proxima Centauri b is the closest exoplanet to Earth, [20] at a distance of about 4.2 ly (1.3 parsecs). [5] It orbits Proxima Centauri every 11.186 Earth days at a distance of about 0.049 AU, [1] over 20 times closer to Proxima Centauri than Earth is to the Sun. [21] As of 2021, it is unclear whether it has an eccentricity [e] [24] but Proxima Centauri b is unlikely to have any obliquity. [25]
5.9 km (Pluto) 40 140 km (Proxima Centauri) permanent; bikeable (est. 2008) Proxima Centauri scale distance calculated travelling Melbourne to Melbourne via the Poles. [31] Scale Model Solar System [32] Eugene, Oregon: 1,000,000,000 1.4 m 1.2 cm 150 m 5.9 km permanent; bikeable (est. 1997) Planetstien, Sandnes Sandnes, Norway: 1,000,000,000 1.4 m
The closest star to Earth, Proxima Centauri (PC), is still about 8000 times further away from us than Pluto. Propelling a probe to PC will require a much higher cruising speed than we can ...
The nearest star and planetary system to the Sun, at a distance of 4.24 ly (1.30 pc), orbiting around Alpha Centauri AB System, the nearest star system to the Sun. Age: 4.85 Gyr. [165] Has a confirmed planet, Proxima Centauri b, [166] a disputed planet, Proxima Centauri c, [167] and a unconfirmed planet, Proxima Centauri d. Reported for reference.
The 1007 multiplanetary systems are listed below according to the star's distance from Earth. Proxima Centauri, the closest star to the Solar System, has three planets (b, c and d). The nearest system with four or more confirmed planets is Gliese 876, with four known.