SN 1999eu

{{Short description|1999 supernova event in the constellation Fornax, inside NGC 1097}}

{{Supernova

| name = SN 1999eu

| image =

| caption =

| epoch = J2000.0

| type = SN

| SNRtype = IIP

| host = NGC 1097

| constellation = Fornax

| ra = 02^h 46^m 20.79^s

| dec = -30° 19' 06.1"

| gal = 227.0163 -64.6743

| discovery = 5 November 1999

| iauc =

| mag_v = 17.3

| distance = 45 Mly

| notes =

}}

SN 1999eu was a type IIP supernova that happened in NGC 1097, a barred spiral galaxy about 45 million light years away, in the constellation Fornax. It was discovered 5 November 1999, possibly three months after its initial brightening, and is unusually under-luminous for a type II supernova.{{cite journal|author1=Pastorello, A. |author2=Zampieri, L. |author3=Turatto, M. |author4=Cappellaro, E. |author5=Meikle, W. P. S. |author6=Benetti, S. |author7=Branch, D. |author8=Baron, E. |author9=Patat, F. |author10=Armstrong, M. |author11=Altavilla, G. |author12=Salvo, M. |author13=Riello, M. |date=2004|title=Low-luminosity Type II supernovae: spectroscopic and photometric evolution|journal=Monthly Notices of the Royal Astronomical Society|volume=347|issue=1|pages=74–94|doi=10.1111/j.1365-2966.2004.07173.x |doi-access=free | bibcode=2004MNRAS.347...74P|arxiv = astro-ph/0309264 |s2cid=119071025 }}