Talitha (star)

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Star
Talitha (ι UMa Aa)
AladinLite
Observation
dates equinox :  J2000.0 , epoch : J2000.0
Constellation Big Bear
Right ascension 08 h 59 m 12.5 s
declination + 48 ° 02 ′ 31 ″
Apparent brightness 3.14 (3.12-3.18) mag
Typing
Spectral class A7 IV
Astrometry
parallax (68.92 ± 0.16)  mas
distance (47.32 ± 0.11)  ly
(14.51 ± 0.03)  pc
Physical Properties
Other names
and catalog entries
Bayer name Iota Ursae Majoris
Flamsteed name 9 Ursae Majoris
Bonn survey BD + 48 ° 1707
Bright Star Catalog HR 3569 [1]
Henry Draper Catalog HD 76644 [2]
Gliese catalog FY 331 [3]
Hipparcos catalog HIP 44127 [4]
SAO catalog SAO 42630 [5]
Tycho catalog TYC 3420-2149-1 [6]
2MASS catalog 2MASS J08591246 + 4802304 [7]
Other names Talitha • FK5  335 • ADS 7114 • WDS J08592 + 4803

Talitha , also Iota Ursae Majoris , ι Ursae Majoris or ι UMa ( Bayer designation ), is about 47 light-years from the sun distant multiple star system in the constellation Ursa Major . The main star of the system Iota Ursae Majoris, ι UMa Aa, belongs to the spectral class A7 and has an apparent magnitude of 3.1 mag.

The proper name Talitha (spelling according to IAU , without addition) for the main star (ι UMa Aa) refers to the historical proper name Talitha Borealis ; the Arabic Talitha means “third (leap of the gazelle)”, the Latin borealis “north”. Talitha Australis (from Latin australis "south") is the corresponding name for the neighboring star system Kappa Ursae Majoris, whose main star κ UMa A has the proper name Alkaphrah .

Others

The occasional name Dnoces for this star is of modern origin and goes back to a joke by the Apollo astronaut Virgil "Gus" Grissom , who used the names of the Apollo 1 team as " Navi " (for Virgil Ivan Grissom), "Dnoces" (for Edward H. White the second ) and " Regor " (for Roger Chaffee) on a list of navigational stars.

Conjunction of Talitha with the comet C / 2020 F3 , at the lower edge of the picture the star Alkaphrah , Kappa Ursae Majoris or Talitha Australis

On the night of July 18-19, 2020 (9:30 p.m. UTC ), the conjunction with comet C / 2020 F3 (NEOWISE ) occurred , with the distance between Talitha (Borealis) and the comet only being seven arc minutes .

Individual evidence

  1. ↑ a b c iot UMa. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed on July 30, 2020 .
  2. ↑ a b NSV 4329. In: VSX. AAVSO , accessed July 30, 2020 .
  3. ↑ See List of IAU-approved Star Names as of 10 August 2018 .
  4. ↑ Apollo 15 Lunar Surface Journal: Post-Landing Activities, Commentary on 105: 11: 33