Lalande 21185
Sign in to saveAlso known as HD 95735, Argelander's second star, Gliese 411, HIP 54035
star in the constellation Ursa Major
In the Vinony graph
Within Vinony's link graph, Lalande 21185 is referenced by 428 other articles, and connects out to list of stars in Ursa Major, star catalogue and year.
It is catalogued under topics including BY Draconis variables, Durchmusterung objects and Gliese and GJ objects.
Its subject is documented across 34 Wikipedia language editions.
Astronomical data · SIMBAD
- Object type
- PM*
- Spectral type
- M2+V
- Distance
- 8 light-years
- Redshift
- z = -0.0002822888066921214
- Coordinates
- RA 165.8341° · Dec 35.9699°
via SIMBAD · CDS Strasbourg
Key facts
- Constellation
- Ursa Major
- Right ascension
- 11 03 20.19482
- Declination
- +35 ° 58 ′ 11.5762 ″
- Spectral type
- M2V
- Apparent magnitude b
- 8.960 ± 0.007
- Apparent magnitude r
- ~6.6
- Apparent magnitude i
- ~5.8
- Apparent magnitude j
- 4.203 ±0.242
- Apparent magnitude h
- 3.640 ±0.202
- Apparent magnitude k
- 3.254 ±0.306
- U b color index
- +1.074
- B v color index
- +1.444
- Variable type
- BY
via Wikipedia infobox
Wikidata facts
- Constellation
- Ursa Major
- Distance from Earth
- 2.55
- Diameter
- 611000
- Radius
- 0.393
- Mass
- 0.46
- Variable-star type
- rotating variable star
Show 21 more facts
- spectral class
- dM2
- catalog code
- UBV M 16736
- stellar rotational velocity
- 6.54
- time of discovery or invention
- 1801-00-00
- effective temperature
- 3652
- apparent magnitude
- 6.551172
- metallicity
- -0.25
- absolute magnitude
- 10.46
- parallax
- 392.7529
- discoverer or inventor
- Jérôme Lalande
- radial velocity
- -84.237602
- epoch
- J2000.0
- angular diameter
- 1.42
- surface gravity
- 52000
- luminosity
- 0.0016
- age estimated by a dating method
- 7.5
- right ascension component of proper motion
- -565
- declination component of proper motion
- -4745
- Commons category
- Lalande 21185
- right ascension
- 165.8341450816425
- declination
- 35.96988227279361
via Wikidata · CC0
~9 min read
Encyclopedic overview
Lalande 21185 (also known as BD+36 2147, Gliese 411, and HD 95735) is a star in the south of Ursa Major. It is the apparent brightest red dwarf in the northern hemisphere. Despite this, and being relatively close by, it is very dim (as are all red dwarfs), being only magnitude 7.5 in visible light and thus too faint to be seen with the unaided eye. The star is visible through a small telescope or binoculars.
At 8.304 light-years (2.546 parsecs) away it is one of the stars nearest to the Solar System; only the Alpha Centauri system, Barnard's Star, Wolf 359, and the brown dwarfs Luhman 16 and WISE 0855−0714 are known to be closer. Because of its proximity it is a frequent subject for astronomical surveys and other research and thus is known by numerous other designations, most commonly Gliese 411 and HD 95735. In approximately 19,900 years it will be at its closest, about 4.65 ly (1.43 pc) from the Sun, just over half its present distance.
Excerpted from Wikipedia’s “Lalande 21185” article, available under the CC BY-SA 4.0 licence.