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Arp 240 information


Arp 240
Arp 240. The two galaxies are NGC 5257 (right) and NGC 5258 (left).
Observation data (J2000 epoch)
ConstellationVirgo
Right ascensionRight13h 39m 52.3s[1]
Left13h 39m 57.7s[2]
DeclinationRight: +00° 50′ 22″[1]
Left: +00° 49′ 51″[2]
RedshiftRight: 6798 ± 9 km/s[1]
Left: 6757 ± 1 km/s[2]
DistanceRight: 345.1 Mly
(105.8 Mpc)[3]
Left: 342.1 Mly
(104.9 Mpc)[3]
Apparent magnitude (V)12.9 / 12.9[1][2]
Characteristics
TypeRight: SAB(s)b pec[1]
Left: SA(s)b pec[2]
Apparent size (V)Right: 1.8′ × 0.9′[1]Left: 1.7′ × 1.1′[1]
Notable featuresInteracting galaxies
Other designations
Right: NGC 5257, UGC 8641, PGC 48330, VV 55b[1]
Left: NGC 5258, UGC 8645, PGC 48338, VV 55a[1]
The location of Arp 240 (circled in red)

Arp 240 is a pair of interacting spiral galaxies located in the constellation Virgo. The two galaxies are listed together as Arp 240 in the Atlas of Peculiar Galaxies.[4] The galaxy on the right is known as NGC 5257, while the galaxy on the left is known as NGC 5258. Both galaxies are distorted by the gravitational interaction, and both are connected by a tidal bridge, as can be seen in images of these galaxies.

One supernova has been observed in NGC 5258: SN 2020dko (type Ia, mag. 19).[5]

  1. ^ a b c d e f g h i Cite error: The named reference ned was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference ned2 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference mould was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference arp1966 was invoked but never defined (see the help page).
  5. ^ Transient Name Server entry for SN 2020dko. Retrieved 25 March 2023.

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Arp 240

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Arp 240 is a pair of interacting spiral galaxies located in the constellation Virgo. The two galaxies are listed together as Arp 240 in the Atlas of Peculiar...

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Lambda Virginis

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5854 5855 5864 5865 5869 Other A1689-zD1 Abell 1835 IR1916 Arp 240 (NGC 5257 and NGC 5258) Arp 271 (NGC 5426 and NGC 5427) BR 1202-0725 3C 273 3C 279 3C...

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Theta Virginis

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5854 5855 5864 5865 5869 Other A1689-zD1 Abell 1835 IR1916 Arp 240 (NGC 5257 and NGC 5258) Arp 271 (NGC 5426 and NGC 5427) BR 1202-0725 3C 273 3C 279 3C...

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Phi Virginis

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5854 5855 5864 5865 5869 Other A1689-zD1 Abell 1835 IR1916 Arp 240 (NGC 5257 and NGC 5258) Arp 271 (NGC 5426 and NGC 5427) BR 1202-0725 3C 273 3C 279 3C...

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Kappa Virginis

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5854 5855 5864 5865 5869 Other A1689-zD1 Abell 1835 IR1916 Arp 240 (NGC 5257 and NGC 5258) Arp 271 (NGC 5426 and NGC 5427) BR 1202-0725 3C 273 3C 279 3C...

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Psi Virginis

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5854 5855 5864 5865 5869 Other A1689-zD1 Abell 1835 IR1916 Arp 240 (NGC 5257 and NGC 5258) Arp 271 (NGC 5426 and NGC 5427) BR 1202-0725 3C 273 3C 279 3C...

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Nu Virginis

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5854 5855 5864 5865 5869 Other A1689-zD1 Abell 1835 IR1916 Arp 240 (NGC 5257 and NGC 5258) Arp 271 (NGC 5426 and NGC 5427) BR 1202-0725 3C 273 3C 279 3C...

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Abell 36

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5854 5855 5864 5865 5869 Other A1689-zD1 Abell 1835 IR1916 Arp 240 (NGC 5257 and NGC 5258) Arp 271 (NGC 5426 and NGC 5427) BR 1202-0725 3C 273 3C 279 3C...

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Omega Virginis

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5854 5855 5864 5865 5869 Other A1689-zD1 Abell 1835 IR1916 Arp 240 (NGC 5257 and NGC 5258) Arp 271 (NGC 5426 and NGC 5427) BR 1202-0725 3C 273 3C 279 3C...

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Upsilon Virginis

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5854 5855 5864 5865 5869 Other A1689-zD1 Abell 1835 IR1916 Arp 240 (NGC 5257 and NGC 5258) Arp 271 (NGC 5426 and NGC 5427) BR 1202-0725 3C 273 3C 279 3C...

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Sigma Virginis

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5854 5855 5864 5865 5869 Other A1689-zD1 Abell 1835 IR1916 Arp 240 (NGC 5257 and NGC 5258) Arp 271 (NGC 5426 and NGC 5427) BR 1202-0725 3C 273 3C 279 3C...

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Xi Virginis

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5854 5855 5864 5865 5869 Other A1689-zD1 Abell 1835 IR1916 Arp 240 (NGC 5257 and NGC 5258) Arp 271 (NGC 5426 and NGC 5427) BR 1202-0725 3C 273 3C 279 3C...

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Tau Virginis

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5854 5855 5864 5865 5869 Other A1689-zD1 Abell 1835 IR1916 Arp 240 (NGC 5257 and NGC 5258) Arp 271 (NGC 5426 and NGC 5427) BR 1202-0725 3C 273 3C 279 3C...

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Omicron Virginis

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5854 5855 5864 5865 5869 Other A1689-zD1 Abell 1835 IR1916 Arp 240 (NGC 5257 and NGC 5258) Arp 271 (NGC 5426 and NGC 5427) BR 1202-0725 3C 273 3C 279 3C...

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38 Virginis

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5854 5855 5864 5865 5869 Other A1689-zD1 Abell 1835 IR1916 Arp 240 (NGC 5257 and NGC 5258) Arp 271 (NGC 5426 and NGC 5427) BR 1202-0725 3C 273 3C 279 3C...

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Pi Virginis

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