NGC 253  V NGC  247       Displaced HI centroids indicate that these galaxies 
NGC 253  V NGC  247        form a "stable pair" (Lewis, 1969PASAu...1..288L).
NGC 520  V NGC  520       NGC 520 is probably a pair of colliding galaxies 
NGC 520  V NGC  520        (Stockton and Bertola 1980).
NGC 660  V NGC  660?      NGC 660 nay be two intersecting spirals (Kormendy, 
NGC 660  V NGC  660?       1977, Priv. Comm.). Mrk 369 = III Zw 50 is a blue 
NGC 660  V NGC  660?       conpact galaxy near NGC 992 with nearly the same 
NGC 660  V NGC  660?       redshift (Barbon, 1969MmSAI..40..211B; Keel, 1980, 
NGC 660  V NGC  660?       Priv. Comm.) , so the two appear to be a physical 
NGC 660  V NGC  660?       pair.
NGC 1068 V NGC 1068 group NGC 1068 is the brightest member of the group 
NGC 1068 V NGC 1068 group  including NGC 1055, NGC 1073, NGC 1087, NGC 1090, 
NGC 1068 V NGC 1068 group  NGC 1094, and NGC 1104 (RCBG2, Cat. <VII/112>).
IC 342   V A 0355         The disturbed HI density distribution and velocity 
IC 342   V A 0355          field of IC 342 show that it is tidally interacting 
IC 342   V A 0355          with A 0355 (Rots, 1979A&A....80..255R).
NGC 2146 V none?          NGC 2146 has a peculiar HI profile and an HI envelope 
NGC 2146 V none?           extending 6 Holmberg radii, but no obvious companion 
NGC 2146 V none?           to cause this disturbance (Fisher and Tully, 
NGC 2146 V none?           1976A&A....53..397F).
NGC 2623 V NGC 2623       NGC 2623 is a triple system (Nilson, 1973, <VII/26>).
NGC 2639 V A 0843+49?     A 0843+49 is "surely a companion" of NGC 2639 
NGC 2639 V A 0843+49?      (Arp, 1980ApJ...236...63A). A "very faint thin spiral
NGC 2639 V A 0843+49?      arm" (Morgan, 1959PASP...71..394M) has been drawn 
NGC 2639 V A 0843+49?      from NGC 2639.
NGC 2782 V Anon           NGC 2782 forms an "interacting?" pair with an 
NGC 2782 V Anon            anonymous SB(s) spiral 11.8' away (RCBC2). NGC 2782 
NGC 2782 V Anon            has a "peculiar" HI profile and a "long, diffuse 
NGC 2782 V Anon            low-surface brightness arm trailing off to one side" 
NGC 2782 V Anon            (Roberts, 1978AJ.....83.1026).
NGC 2992 V NGC 2993       Optical spectroscopy shows NGC 2992 and NGC 2993 form 
NGC 2992 V NGC 2993        an interacting pair (Burbidge et al., 
NGC 2992 V NGC 2993        1972ApJ...178L..43B).
NGC 3031 V M81 group      Common HI envelope (cf., Solinger, Morrison, and 
NGC 3031 V M81 group       Markert, 1977ApJ...211..707S).
NGC 3034 V M81 group      Common HI envelope (cf., Solinger, Morrison, and 
NGC 3034 V M81 group       Markert, 1977ApJ...211..707S).
NGC 3079 V NGC 3073, Anon NGC 3079 is paired with NGC 3073 and an anonymous 
NGC 3079 V NGC 3073, Anon  galaxy 65 away (RCBG2, Cat. <VII/112>). The redshifts
NGC 3079 V NGC 3073, Anon  of NGC 3073 Mrk 131 and NGC 3079 are nearly the same 
NGC 3079 V NGC 3073, Anon  (Huchra, 1976, Ph. D. Thesis, California Institute of
NGC 3079 V NGC 3073, Anon  Technology).
NGC 3227 V NGC 3226       Photographic and spectroscopic evidence of interaction
NGC 3227 V NGC 3226        is given by Rubin and Ford (1968ApJ...154..431R).
NGC 3504 V NGC 3512       RCBG2, Cat. <VII/112>
NGC 3628 V NGC 3627       An HI tail shows that NGC 3628 is tidally disturbed by
NGC 3628 V NGC 3627        NGC 3627 (Rots, 1978AJ.....83..219R)
NGC 3690 V IC 694         NGC 3690 and IC 694 form a contact pair of "colliding 
NGC 3690 V IC 694          or strongly interacting" galaxies (RCBG2, 
NGC 3690 V IC 694          Cat. <VII/112>).
NGC 4102 V none
NGC 4151 V NGC 4151       NGC 4151 is "paired with" NGC 4145 (Nilson, 1973, 
NGC 4151 V NGC 4151        Cat. <VII/26>).
NGC 4536 V NGC 4533       These galaxies form a pair without evidence of 
NGC 4536 V NGC 4533        interaction (RCBG2, Cat. <VII/112>).
NGC 4594   none   
NGC 5236 V NGC 5253       Distortions in the HI emission of NGC 5236 have been 
NGC 5236 V NGC 5253        interpreted as evidence that NGC 5236 is paired with 
NGC 5236 V NGC 5253        (Lewis, 1969PASAu...1..288L) or possibly paired with 
NGC 5236 V NGC 5253        (Rogstad, Lockhart, and Wright, 1974ApJ...193..309R) 
NGC 5236 V NGC 5253        NGC 5253.
NGC 5430 V NGC 5430?      The peculiar object NGC 5430 has "[a] very broad, 
NGC 5430 V NGC 5430?       slightly curved bar; 3 arms, one off center" (Nilson,
NGC 5430 V NGC 5430?       1973, Cat. <VII/26>). The compact radio source is not
NGC 5430 V NGC 5430?       centered in this bar unless the knot at its end and 
NGC 5430 V NGC 5430?       the "off center" arm are in a companion in contact 
NGC 5430 V NGC 5430?       with the main galaxy consisting of the bar and two 
NGC 5430 V NGC 5430?       main arms.
NGC 5506 V NGC 5507       There is no optical evidence for interaction in this 
NGC 5506 V NGC 5507        pair (RCBG2, Cat. <VII/112>).
NGC 5635   none
NGC 5675   none
NGC 6240 V NGC 6240       NGC 6240 is "strongly peculiar, jet plus loop, 
NGC 6240 V NGC 6240        eruptive?" (Nilson, 1973, Cat. <VII/26>). The 
NGC 6240 V NGC 6240        compact-radio-source position strongly suggests 
NGC 6240 V NGC 6240        that two overlapping galaxies are present.
NGC 6500   NGC 6501       NGC 6500 is paired with NGC 6501 and is in a small 
NGC 6500   NGC 6501        group (RCBG2, Cat. <VII/112>).
NGC 6946 V none
NGC 7469 V IC 5283        Spectroscopic observations show that IC 5283 is 
NGC 7469 V IC 5283         definitely a physical companion of NGC 7469 
NGC 7469 V IC 5283         (Burbidge et al., 1963ApJ...137.1022B).
NGC 7674 V NGC 7675       RCBG2, Cat. <VII/112>.
NGC 7682 V NGC 7679       These galaxies form an "interacting?" pair (RCBG2, 
NGC 7682 V NGC 7679        Cat. <VII/112>).