Mushure mekunge McCall awana H+3 mumakore ekutanga a1998, akaona kuti paive nemitsetse yeH+3 mumakore ekutanga a1998. McCall akaona tembiricha ye ~ 27 K (-246 °C) uye density ye ~ 1014/cm2, iyo density yakafanana neGeballe & Oka. Kubvira ipapo, H+3 yakaonekwa mune mamwe makore akawanda, akadai seGCS 3-2, GC IRS 3, uye Persei ζ. Mubvunzo: Ndeipi tembiricha yakaonekwa naMcCall?
~27 K (−246 °C)