Sentences with phrase «visual luminosity of stars»

Not exact matches

According to various estimates, the star has about 1.7 times Sol's mass (RECONS), 1.8 times its equatorial diameter (JPL press release, 2001; T. Moon, 1985; Morossi and Malagnini, 1985, page 369; and Johnson and Wright, 1983, page 695), and about 10.7 times its visual luminosity and 9.845 its bolometric luminosity (NASA Star and Exoplanet Database, derived from of Kenneth R. Lang, 19star has about 1.7 times Sol's mass (RECONS), 1.8 times its equatorial diameter (JPL press release, 2001; T. Moon, 1985; Morossi and Malagnini, 1985, page 369; and Johnson and Wright, 1983, page 695), and about 10.7 times its visual luminosity and 9.845 its bolometric luminosity (NASA Star and Exoplanet Database, derived from of Kenneth R. Lang, 19Star and Exoplanet Database, derived from of Kenneth R. Lang, 1980).

With a visual luminosity that has reportedly varied between 0.000053 and 0.00012 of Sol's (based on a distance of 4.22 light - years) the star is as much as 19,000 times fainter than the Sun, and so if it was placed at the location of our Sun from Earth, the disk of the star would barely be visible.

The star has a mass around 82 + / -3 percent of Sol's (Bouchy et al, 2005), 0.753 + / - 0.025 percent of its diameter (Winn et al, 2006; Masana et al, 2006; and Bouchy et al, 2005), and a visual luminosity as low as 26.4 percent of Sol's.

61 Virginis is a yellow - orange main sequence dwarf of spectral and luminosity type G5 - 6 V, with about 92 to 96 percent of Sol's mass (95 percent using the isochrone mass estimate of Valenti and Fischer, 2005; and NASA Star and Exoplanet Database, based on David F. Gray, 1992), 94 to 98 percent of its diameter (96 percent for Valenti and Fischer, 2005; Johnson and Wright, 1983, page 677; and NASA Star and Exoplanet Database, derived from the exponential formula of Kenneth R. Lang, 1980), and around 78 percent of its visual luminosity and nearly 81 percent of its theoretical bolometric luminosity, with infrared radiation (Sousa et al, 2008; Valenti and Fischer, 2005; NASA Star and Exoplanet Database, based on Kenneth R. Lang, 1980).

The star has almost a half (48 to 49 percent) of Sol's mass (Zechmeister et al, 2009, from Delfosse et al, 2000; and NASA Star and Exoplanet Database, derived from Henry and McCarthy, 1993), 48 to 57 percent of its diameter (NASA Star and Exoplanet Database, derived from Kenneth R. Lang, 1980; and Johnson and Wright, 1983, page 673), and percent of its visual and around 3.3 + / - 0.2 of its bolometric luminosity and McCarthy, 1993), 48 to 57 percent of its diameter (NASA Star and Exoplanet Database, derived from Kenneth R. Lang, 19star has almost a half (48 to 49 percent) of Sol's mass (Zechmeister et al, 2009, from Delfosse et al, 2000; and NASA Star and Exoplanet Database, derived from Henry and McCarthy, 1993), 48 to 57 percent of its diameter (NASA Star and Exoplanet Database, derived from Kenneth R. Lang, 1980; and Johnson and Wright, 1983, page 673), and percent of its visual and around 3.3 + / - 0.2 of its bolometric luminosity and McCarthy, 1993), 48 to 57 percent of its diameter (NASA Star and Exoplanet Database, derived from Kenneth R. Lang, 19Star and Exoplanet Database, derived from Henry and McCarthy, 1993), 48 to 57 percent of its diameter (NASA Star and Exoplanet Database, derived from Kenneth R. Lang, 1980; and Johnson and Wright, 1983, page 673), and percent of its visual and around 3.3 + / - 0.2 of its bolometric luminosity and McCarthy, 1993), 48 to 57 percent of its diameter (NASA Star and Exoplanet Database, derived from Kenneth R. Lang, 19Star and Exoplanet Database, derived from Kenneth R. Lang, 1980; and Johnson and Wright, 1983, page 673), and percent of its visual and around 3.3 + / - 0.2 of its bolometric luminosity and McCarthy, 1993), 48 to 57 percent of its diameter (NASA Star and Exoplanet Database, derived from Kenneth R. Lang, 19Star and Exoplanet Database, derived from Kenneth R. Lang, 1980).

The star has about 70 to 77 percent of Sol's mass (RECONS; and NASA Star and Exoplanet Database, interpolated from David F. Gray, 1992), 68 to 76 percent of its diameter (Johnson and Wright, 1983, page 701; and NASA Star and Exoplanet Database, derived using the power law formula from Kenneth R. Lang, 1980), and about 14.7 percent of its visual luminosity and 20.4 percent of its theoretical bolometric luminosity, correcting for infrared output (NASA Star and Exoplanet Database, derived using exponential formula from Kenneth R. Lang, 19star has about 70 to 77 percent of Sol's mass (RECONS; and NASA Star and Exoplanet Database, interpolated from David F. Gray, 1992), 68 to 76 percent of its diameter (Johnson and Wright, 1983, page 701; and NASA Star and Exoplanet Database, derived using the power law formula from Kenneth R. Lang, 1980), and about 14.7 percent of its visual luminosity and 20.4 percent of its theoretical bolometric luminosity, correcting for infrared output (NASA Star and Exoplanet Database, derived using exponential formula from Kenneth R. Lang, 19Star and Exoplanet Database, interpolated from David F. Gray, 1992), 68 to 76 percent of its diameter (Johnson and Wright, 1983, page 701; and NASA Star and Exoplanet Database, derived using the power law formula from Kenneth R. Lang, 1980), and about 14.7 percent of its visual luminosity and 20.4 percent of its theoretical bolometric luminosity, correcting for infrared output (NASA Star and Exoplanet Database, derived using exponential formula from Kenneth R. Lang, 19Star and Exoplanet Database, derived using the power law formula from Kenneth R. Lang, 1980), and about 14.7 percent of its visual luminosity and 20.4 percent of its theoretical bolometric luminosity, correcting for infrared output (NASA Star and Exoplanet Database, derived using exponential formula from Kenneth R. Lang, 19Star and Exoplanet Database, derived using exponential formula from Kenneth R. Lang, 1980).

The star has a mass that is six to eight times greater than Sol's (see Petr Harmanec, 1988; and James Kaler), 14.4 (+ / - 0.4, polar) to 24.0 (+ / - 0.8, equatorial) times its diameter (ESO; and Domicano de Souza et al, 2003), and 1,070 times its visual luminosity and at least 2,900 to 5,400 times its bolometric luminosity (depending on the estimate of ultraviolet radiation).

Lacaille 9352 may have 50 to 58 of Sol's mass (Demory et al, 2009, Table 4; RECONS; and NASA Star and Exoplanet Database, interpolation table of Henry and McCarthy, 1993), less than half (43 to 46 percent) of its diameter (Demory et al, 2009, Table 4; and NASA Star and Exoplanet Database, derived from the power law formula of Kenneth R. Lang, 1980), 1.1 percent of its visual luminosity and 3.5 percent of its bolometric luminosity (NASA Star and Exoplanet Database, derived from the exponential formula of Kenneth R. Lang, 1980), and only about one tenth to 60 percent of Sol's abundance of elements heavier than hydrogen («metallicity»)(Demory et al, 2009, Table 4).

Based on an interpolation table, the star's has around 2.10 of Sol's mass (NASA Stars and Exoplanet Database; and David F. Gray, 1992), 1.58 times its diameter (Akeson et al, 2009), and around 11.5 times its visual luminosity and 13.4 times its theoretical bolometric luminosity (Akeson et al, 2009; NASA Stars and Exoplanet database; and Kenneth R. Lang, 1980).

The star has 15.7 ± 1.9 percent of Sol's mass, 21.1 (± 0.97 percent of its diameter, and under 0.02 percent of its visual and over 0.328 percent of its bolometric luminosity (Rogers and Seager, 2009).

The star has almost a half (49 + / - 0.014 percent) of Sol's mass (Endl et al, 2008), 52 to 53 percent of its diameter (NASA Star and Exoplanet Database, derived from Kenneth R. Lang, 1980; Pasinetti - Fracassini et al, 2001; and Johnson and Wright, 1983, page 655), and less than 0.8 percent of its visual and 3.5 ± 0.3 of its bolometric luminosity (NASA Star and Exoplanet Database, derived from Kenneth R. Lang, 19star has almost a half (49 + / - 0.014 percent) of Sol's mass (Endl et al, 2008), 52 to 53 percent of its diameter (NASA Star and Exoplanet Database, derived from Kenneth R. Lang, 1980; Pasinetti - Fracassini et al, 2001; and Johnson and Wright, 1983, page 655), and less than 0.8 percent of its visual and 3.5 ± 0.3 of its bolometric luminosity (NASA Star and Exoplanet Database, derived from Kenneth R. Lang, 19Star and Exoplanet Database, derived from Kenneth R. Lang, 1980; Pasinetti - Fracassini et al, 2001; and Johnson and Wright, 1983, page 655), and less than 0.8 percent of its visual and 3.5 ± 0.3 of its bolometric luminosity (NASA Star and Exoplanet Database, derived from Kenneth R. Lang, 19Star and Exoplanet Database, derived from Kenneth R. Lang, 1980).

This star has been estimated to have around 21 to 27 percent of Sol's mass (Tuomi et al, 2014; and Bonfils et al, 2013), 27 percent of its diameter (Pasinetti - Fracassini et al, 2001), and about 0.2 percent of its visual luminosity).