BD+49°1766, HIP 42994, TYC 3420-1971-1, GSC 03420-01971, 2MASS J08454693+4852435[8]
Database references
SIMBAD
data
HD 74389 is a double star system approximately 425 light years from Earth. The primary, HD 74389 A, was initially listed in the Hipparcos catalog as an A0V spectral type star, but this was subsequently updated in 1990 as A2V when Sanduleak and Pesch imaged it with the Burrell Schmidt telescope at Kitt Peak.[9]
The primary component is a white A-type main sequence star with an apparent magnitude of +7.48. Its furthest companion, HD 74389 B, is a DA-type white dwarf located 20.11 arcseconds west of—at least 190 AU from—HD 74389 A, and has a V magnitude of 14.62.
On August 4, 2016, NASA's Goddard Space Flight Center announced that its citizen science program, Disk Detective, discovered a debris disk orbiting the primary, making this the first disk ever discovered around a star with a companion white dwarf.[10] Cataloged as DDOI AWI00000wz, the disk temperature was observed to be at most 136 K. Although stars with white dwarf companions are common, and there are three known planetary systems with white dwarfs as distant companions (Gl 86, HD 27442, and HD 147513), no debris disks had previously been discovered with a closely associated white dwarf.[11]
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^ abcdefghCite error: The named reference bergeron was invoked but never defined (see the help page).
^ abcdeCite error: The named reference Gaia DR2 for B was invoked but never defined (see the help page).
^ abCite error: The named reference ubv was invoked but never defined (see the help page).
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^ abcdCite error: The named reference holberg was invoked but never defined (see the help page).
^ abCite error: The named reference mcdonald was invoked but never defined (see the help page).
^Cite error: The named reference Simbad was invoked but never defined (see the help page).
^Sanduleak, N.; Pesch, Peter (1990). "On a possible white-dwarf companion to HD 74389". Publications of the Astronomical Society of the Pacific. 102: 440. Bibcode:1990PASP..102..440S. doi:10.1086/132651.
^Kuchner, Marc. "Our First Paper and the First Debris Disk with a White Dwarf Companion!" Web blog post. Disk Detective: A Zooniverse project blog. 4 August 2016.
^Kuchner, Marc J.; Silverberg, Steven M.; Bans, Alissa S.; Bhattacharjee, Shambo; Kenyon, Scott J.; Debes, John H.; Currie, Thayne; Garcia, Luciano; Jung, Dawoon; Lintott, Chris; McElwain, Michael; Padgett, Deborah L.; Rebull, Luisa M.; Wisniewski, John P.; Nesvold, Erika; Schawinski, Kevin; Thaller, Michelle L.; Grady, Carol A.; Biggs, Joseph; Bosch, Milton; Cernohous, Tadeás; Luca, Hugo A. Durantini; Hyogo, Michiharu; Wah, Lily Lau Wan; Piipuu, Art; Piñeiro, Fernanda (19 July 2016). "Disk Detective: Discovery of New Circumstellar Disk Candidates through Citizen Science". The Astrophysical Journal. 830 (2): 84. arXiv:1607.05713. Bibcode:2016ApJ...830...84K. doi:10.3847/0004-637X/830/2/84. S2CID 28650844.
HD74389 is a double star system approximately 425 light years from Earth. The primary, HD74389 A, was initially listed in the Hipparcos catalog as an...
KIC 8462852 (2016) is an F-type star showing unusual dimming events. HD74389 (2016) contains a debris disk. It is the first debris disk discovered around...
Sanduleak, N.; Pesch, Peter (1990). "On a possible white-dwarf companion to HD74389". Publications of the Astronomical Society of the Pacific. 102: 440. Bibcode:1990PASP...
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1972 NRHP-listed 818 N Market St. 39°44′38″N 75°32′55″W / 39.74389°N 75.54861°W / 39.74389; -75.54861 (Masonic Hall and Grand Theater) Wilmington, Delaware...
EK EN EP ER ET EU EV EZ IY KS HR 3922 4067 4098 4132 4867 5148 HD 68988 (Násti) 74389 80606 80607 84406 98618 99706 118203 (Liesma) 233731 Other ADS 7251...
EK EN EP ER ET EU EV EZ IY KS HR 3922 4067 4098 4132 4867 5148 HD 68988 (Násti) 74389 80606 80607 84406 98618 99706 118203 (Liesma) 233731 Other ADS 7251...
EK EN EP ER ET EU EV EZ IY KS HR 3922 4067 4098 4132 4867 5148 HD 68988 (Násti) 74389 80606 80607 84406 98618 99706 118203 (Liesma) 233731 Other ADS 7251...
"New Precision Orbits of Bright Double-Lined Spectroscopic Binaries. IX. HD 54371, HR 2692, and 16 Ursa Majoris", The Astronomical Journal, 149 (2): 13...
EK EN EP ER ET EU EV EZ IY KS HR 3922 4067 4098 4132 4867 5148 HD 68988 (Násti) 74389 80606 80607 84406 98618 99706 118203 (Liesma) 233731 Other ADS 7251...
EK EN EP ER ET EU EV EZ IY KS HR 3922 4067 4098 4132 4867 5148 HD 68988 (Násti) 74389 80606 80607 84406 98618 99706 118203 (Liesma) 233731 Other ADS 7251...
EK EN EP ER ET EU EV EZ IY KS HR 3922 4067 4098 4132 4867 5148 HD 68988 (Násti) 74389 80606 80607 84406 98618 99706 118203 (Liesma) 233731 Other ADS 7251...
EK EN EP ER ET EU EV EZ IY KS HR 3922 4067 4098 4132 4867 5148 HD 68988 (Násti) 74389 80606 80607 84406 98618 99706 118203 (Liesma) 233731 Other ADS 7251...