Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Aquila |
Right ascension | 20h 24m 37.49846s [1] |
Declination | +01° 04′ 06.2592″ [1] |
Apparent magnitude (V) | 6.14 [2] |
Characteristics | |
Spectral type | B9V [3] |
U−B color index | −0.14 [2] |
B−V color index | −0.04 [2] |
Astrometry | |
Radial velocity (Rv) | −9.6±0.9 [4] km/s |
Proper motion (μ) | RA: +8.37 [1] mas/yr Dec.: +5.26 [1] mas/yr |
Parallax (π) | 4.04 ± 0.39 [1] mas |
Distance | 810 ± 80 ly (250 ± 20 pc) |
Details | |
Luminosity | 173 [5] L☉ |
Temperature | 8,822 [5] K |
Rotational velocity (v sin i) | 222 [6] km/s |
Other designations | |
Database references | |
SIMBAD | data |
HD 194244 is a variable Be star [7] in the equatorial constellation of Aquila. With an apparent magnitude of 6.14, according to the Bortle scale it is faintly visible to the naked eye from rural skies on a dark night.
Mu Serpentis, Latinized from μ Serpentis, is a binary star in the Serpens Caput (head) section of the equatorial constellation Serpens. It is visible to the naked eye with an apparent visual magnitude of 3.543. Based upon an annual parallax shift of 19.23 mas as seen from Earth, it is located around 170 light years from the Sun.
Pi Tucanae is a double star in the southern constellation of Tucana. It is visible to the naked eye with a combined apparent visual magnitude of +5.49. Based upon an annual parallax shift of 10.25 mas as seen from Earth, it is located around 317 light years from the Sun.
Tau Virginis is a single star in the zodiac constellation Virgo. With an apparent visual magnitude of 4.28, it is faintly visible to the naked eye. The distance to Tau Virginis, based upon parallax measurements, is approximately 225 light years with a margin of error of ±3 light years.
HD 152010 is a star in the southern constellation of Apus.
HD 219659 is suspected variable star in the equatorial constellation of Aquarius.
HD 180262 is a wide double star in the equatorial constellation of Aquila. The pair have an angular separation of 89.823″.
HD 188385 is a star in the equatorial constellation of Aquila.
HD 182475 is a Delta Scuti variable star in the equatorial constellation of Aquila.
HD 158476 is a supergiant star in the southern constellation of Ara. There is a faint magnitude 10.5 companion at an angular separation of 20.0″ along a position angle of 209°.
HD 153791 is a double star in the southern constellation of Ara. The primary is a sixth magnitude A-type main sequence star. It has a magnitude 12.3 companion at an angular separation of 6.0″ along a position angle of 249°, as of 1999.
HD 34790 is a double-lined spectroscopic binary star system in the northern constellation of Auriga. It has a combined apparent magnitude of 5.66, which means it is faintly visible to the naked eye. Based upon observations by the Hipparcos satellite, it is located around 289 light years away. It has a combined stellar classification of A1Vs, matching that of an A-type main sequence star, and shines with 35 times the luminosity of the Sun.
HD 130917 is a single star in the northern constellation of Boötes. It is an A-type main sequence star with a stellar classification of A4V. At an apparent magnitude of 5.80, it is visible to the naked eye.
HD 126200 is a blue dwarf star in the northern constellation of Boötes. It has been identified as an Algol-type eclipsing binary, although subsequent observations do not confirm this.
HD 135438 is a K-type giant star in the northern constellation of Boötes. It has a magnitude 9.36 companion at an angular separation of 118.2″ along a position angle of 158°.
HD 127726 is a binary star system in the northern constellation of Boötes.
HD 134064 is a binary star system in the northern constellation of Boötes. The pair are separated by a distance of around 8,000 AU.
HD 127304 is a double star in the northern constellation of Boötes. The brighter component is a sixth magnitude A-type main sequence star with a stellar classification of A0Vs It has a faint magnitude 10.62 companion at an angular separation of 25.6″ along a position angle of 256°.
HD 132029 is a star in the northern constellation of Boötes. It forms a double star with a magnitude 10.2 companion at an angular separation of 4.6″ along a position angle of 110°.
Rho Ceti , Latinized from ρ Ceti, is the Bayer designation for a star in the equatorial constellation of Cetus. It is faintly visible to the naked eye with an apparent visual magnitude of 4.885. The distance to this star, based upon an annual parallax shift of 7.15 mas, is around 460 light years.
Rho3 Eridani, Latinized from ρ3 Eridani, is a star located in the constellation Eridanus. It forms an asterism with Rho1 and Rho2 Eridani, south of Cetus, in the upper north east portion of Eridanus. The star has an apparent visual magnitude of 5.26, which is bright enough to be seen with the naked eye on a dark, clear night. The distance to this star, as determined via the parallax method, is about 136 light years.