NGC/IC Project Restoration Effort

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NGC3698

 

Basic Information


Location and Magnitude


Right Ascension: 11:29:17.3
Declination: +35:34:32
Constellation: UMA
Visual Magnitude: 13.9

Historic Information


Discoverer: Dreyer
Year of discovery: 1876
Discovery aperture: 72.0

Observational


Summary description: eF, vS
Sub-type: SBbc

Corwin's Notes

===== NGC 3698 = NGC 3695. In March 1867, using LdR's 72-inch telescope, Ball found two nebulae here forming a triangle with h899 = NGC 3694, and suspected others. He did not measure the offsets from JH's nebula; he comments, in fact, "There being no great difference of brightness, it is not easy to see which is h899," but did give the relative positions of "the 2 nf ones, Pos 310 deg, Dist 339[arcsec]." These numbers are accurate for NGC 3695 and NGC 3700. JH's position for NGC 3694 is very good, too. Nine years later, Dreyer re-examined the field, noting that "nnp [h899] is a pS, eeF neb [= N3695] in Pos 357.2, Dist 256.7." This is actually a star. Dreyer goes on, "About 15' n and a few minutes f is another eF, vS neb [= N3700] with an eF * 2' sf." This is actually a reobservation of NGC 3695, (the star is indeed 2 arcmin southeast), though Dreyer took it to be a new nebula and gave it a new number, NGC 3698. The object itself has a double nucleus, easily seen in DSS2R and IR images. The nuclear bulge on blue image suggests a peculiar amorphous bar with faint arms. The SDSS clarifies the picture, showing two superposed spiral galaxies, not obviously interacting -- though I suspect they are. The system is reminiscent of NGC 3314, but considerably more distant.

Steve's Notes

===== NGC 3698 See observing notes for NGC 3695.