List of novae in 2018

class="infobox" style="width: 250px;"

Host galaxies of novae discovered in 2018

{{#invoke:Chart

|pie chart

|radius = 125

|background = lightgray

|slices =

( 15 : Milky Way : lightgrey )

( 23 : Andromeda Galaxy : yellow )

( 8 : Messier 81 : lightblue )

( 1 : Triangulum Galaxy : green )

( 1 : Messier 83 : red )

( 1 : NGC 45 : purple )

|percent = true

}}

The following is a list of all novae that are known to have occurred in 2018. A nova is an energetic astronomical event caused by a white dwarf accreting matter from a star it is orbiting (typically a red giant, whose outer layers are more weakly attached than smaller, denser stars) Alternatively, novae can rarely be caused by a pair of stars merging with each other, however such events are vastly less common than novae caused by white dwarfs.

In 2018, 15 novae were discovered in the Milky Way, 14 being classical novae, and 1 being a dwarf nova of a previously known variable star, V392 Persei, which was discovered in 1972. An additional 23 novae were discovered in the Andromeda Galaxy, 8 in Messier 81, 1 in the Triangulum Galaxy, and 1 in Messier 83. A single luminous red nova was observed in NGC 45.

{{Location map+

| Sky

| width = 1000

| float = center

| border =

| caption = The sky locations of the 15 known galactic novae in 2018. Red dots are classical novae, orange dots are dwarf novae, yellow dots are luminous red novae, and blue dots are recurring novae.

| alt =

| relief =

| AlternativeMap =

| overlay_image =

| places =

{{Location map~|Sky|mark = Red pog.svg|lat_deg = -65.5234|lon_deg = 8.4374}}

{{Location map~|Sky|mark = Red pog.svg|lat_deg = -32.0742|lon_deg = -79.5267}}

{{Location map~|Sky|mark = Red pog.svg|lat_deg = -67.4169|lon_deg = -28.365}}

{{Location map~|Sky|mark = Red pog.svg|lat_deg = -44.9508|lon_deg = -72.2068}}

{{Location map~|Sky|mark = Red pog.svg|lat_deg = -24.3632|lon_deg = -81.1665}}

{{Location map~|Sky|mark = Red pog.svg|lat_deg = -38.2825|lon_deg = -75.9480}}

{{Location map~|Sky|mark = Red pog.svg|lat_deg = -28.8233|lon_deg = -78.5106}}

{{Location map~|Sky|mark = Red pog.svg|lat_deg = -59.5982|lon_deg = 20.9357}}

{{Location map~|Sky|mark = Red pog.svg|lat_deg = -21.2092|lon_deg = 71.5588}}

{{Location map~|Sky|mark = Red pog.svg|lat_deg = -18.0655|lon_deg = -91.0394}}

{{Location map~|Sky|mark = Orange pog.svg|lat_deg = 47.3572|lon_deg = 109.961}}

{{Location map~|Sky|mark = Red pog.svg|lat_deg = -47.745|lon_deg = -54.6827}}

{{Location map~|Sky|mark = Red pog.svg|lat_deg = -14.5122|lon_deg = -97.3457}}

{{Location map~|Sky|mark = Red pog.svg|lat_deg = -20.8858|lon_deg = -85.6004}}

{{Location map~|Sky|mark = Red pog.svg|lat_deg = -53.5041|lon_deg = -63.6372}}

}}

List of novae in 2018

=In the Milky Way=

class="wikitable sortable"

!Nova name

!Discovery date

!Constellation

!Right ascension

!Declination

!Peak
brightness (v){{cite web |last1=Mukai |first1=Koji |title=Recent Novae |url=https://asd.gsfc.nasa.gov/Koji.Mukai/novae/novae.html |website=asd.gsfc.nasa.gov |accessdate=25 January 2019}}

!Distance
(light-years){{Cite DR2}}

!Absolute
magnitude (v)

!Nova type

!Origin system
identified?

!Companion star
spectral typeIn most cases, the spectral type is estimated based on the absolute magnitude

V357 Muscae{{cite web |title=CBET 4473: 20180117 : NOVA MUSCAE 2018 |url=http://www.cbat.eps.harvard.edu/cbet/004400/CBET004473.txt |website=Central Bureau for Astronomical Telegrams |publisher=IAU |accessdate=25 January 2019}}

|2018/01/14

|Musca

|{{RA|11|26|15.03}}

|{{DEC

65|31|24.3}}

|6.5

|{{val|11500|6900|3100}}

|{{val

6.2|0.7|1.0}}

|Classical

|Yes

|F9V/G0V

V1661 Scorpii{{cite web |title=CBET 4481: 20180130 : NOVA SCORPII 2018 = PNV J17180658-3204279 |url=http://www.cbat.eps.harvard.edu/cbet/004400/CBET004481.txt |website=Central Bureau for Astronomical Telegrams |publisher=IAU |accessdate=25 January 2019}}

|2018/01/17

|Scorpius

|{{RA|17|18|06.41}}

|{{DEC

32|04|27.2}}

|10.2

|Classical

|Yes

FM Circini{{cite web |title=CBET 4482: 20180130 : NOVA CIRCINI 2018 = PNV J13532700-6725110 |url=http://www.cbat.eps.harvard.edu/cbet/004400/CBET004482.txt |website=Central Bureau for Astronomical Telegrams |publisher=IAU |accessdate=25 January 2019}}

|2018/01/19

|Circinus

|{{RA|13|53|27.61}}

|{{DEC

67|25|00.9}}

|5.9

|{{val|9400|3700|2100}}

|{{val

6.4|0.6|0.7}}

|Classical

|Yes

|G1V

V1662 Scorpii{{cite web |title=CBET 4488: 20180212 : NOVA SCORPII 2018 No. 2 = PNV J16484962-4457032 |url=http://www.cbat.eps.harvard.edu/cbet/004400/CBET004488.txt |website=Central Bureau for Astronomical Telegrams |publisher=IAU |accessdate=25 January 2019}}

|2018/02/06

|Scorpius

|{{RA|16|48|49.64}}

|{{DEC

44|57|03.0}}

|10.1

|Classical

|Yes

V3664 Ophiuchi{{cite web |title=CBET 4489: 20180225 : NOVA IN OPHIUCHUS = PNV J17244011-2421463 |url=http://www.cbat.eps.harvard.edu/cbet/004400/CBET004489.txt |website=Central Bureau for Astronomical Telegrams |publisher=IAU |accessdate=25 January 2019}}

|2018/02/12

|Ophiuchus

|{{RA|17|24|39.96}}

|{{DEC

24|21|47.4}}

|12.5

|{{val|45000|99999|28000}}

|{{val

3.2|2.1|1.7}}

|Classical

|Yes

|M0II/III

V1663 Scorpii{{cite web |last1=Stanek |first1=K. Z |title=ATel #11348: ASAS-SN Discovery of a Possible Galactic Nova ASASSN-18ds |url=http://www.astronomerstelegram.org/?read=11348 |website=ATel |accessdate=25 January 2019}}

|2018/02/24

|Scorpius

|{{RA|17|03|47.51}}

|{{DEC

38|16|57.1}}

|12.3

|{{val|3400|99999|1800}}

|{{val|2.2|1.6|7.3}}

|Classical

|Maybe

V3665 Ophiuchi{{cite web |title=CBET 4492: 20180312 : NEW NOVA IN OPHIUCHUS = TCP J17140253-2849233 = PNV J17140261-2849237 |url=http://www.cbat.eps.harvard.edu/cbet/004400/CBET004492.txt |website=Central Bureau for Astronomical Telegrams |publisher=IAU |accessdate=25 January 2019}}

|2018/03/10

|Ophiuchus

|{{RA|17|14|02.55}}

|{{DEC

28|49|23.9}}

|9.4

|Classical

|Yes

V906 Carinae{{cite web |title=CBET 4498: 20180322 : NOVA CARINAE 2018 |url=http://www.cbat.eps.harvard.edu/cbet/004400/CBET004498.txt |website=Central Bureau for Astronomical Telegrams |publisher=IAU |accessdate=25 January 2019}}

|2018/03/20

|Carina

|{{RA|10|36|15.43}}

|{{DEC

59|35|53.7}}

|5.9

|{{val|22000|99999|17000}}

|{{val

8.2|3.7|3.3}}

|Classical

|Yes

V435 Canis Majoris{{cite web |title=CBET 4499: 20180325 : NOVA CANIS MAJORIS 2018 = TCP J07134590-2112330 |url=http://www.cbat.eps.harvard.edu/cbet/004400/CBET004499.txt |website=Central Bureau for Astronomical Telegrams |publisher=IAU |accessdate=25 January 2019}}

|2018/03/24

|Canis Major

|{{RA|07|13|45.90}}

|{{DEC

21|12|33.0}}

|12.0

|Classical

|Maybe

V5857 Sagittarii{{cite web |title=CBET 4507: 20180412 : NOVA IN SAGITTARIUS = PNV J18040967-1803581 |url=http://www.cbat.eps.harvard.edu/cbet/004500/CBET004507.txt |website=Central Bureau for Astronomical Telegrams |publisher=IAU |accessdate=25 January 2019}}

|2018/04/08

|Sagittarius

|{{RA|18|04|09.45}}

|{{DEC

18|03|55.9}}

|10.8

|Classical

|Yes

V392 Per{{cite web |title=V0392 Per |url=https://www.aavso.org/vsx/index.php?view=detail.top&oid=25916 |website=International Variable Star Index |publisher=AAVSO |access-date=17 January 2021}}

|2018/04/29

|Perseus

|{{RA|04|43|21.37}}

|{{DEC|47|21|25.9}}

|6.3

|dwarf nova & nova

|Yes

V408 Lupi{{cite web |title=CBET 4520: 20180605 : NOVA LUPI 2018 = PNV J15384000-4744500 |url=http://www.cbat.eps.harvard.edu/cbet/004500/CBET004520.txt |website=Central Bureau for Astronomical Telegrams |publisher=IAU |accessdate=25 January 2019}}

|2018/06/03

|Lupus

|{{RA|15|38|43.86}}

|{{DEC

47|44|42.0}}

|9.0

|{{val|2910|1700|780}}

|{{val

0.8|0.7|1.0}}

|Classical

|Maybe

|K7V?

V613 Scuti{{cite web |title=CBET 4530: 20180703 : NOVA SCUTI 2018 = TCP J18292290-1430460 |url=http://www.cbat.eps.harvard.edu/cbet/004500/CBET004530.txt |website=Central Bureau for Astronomical Telegrams |publisher=IAU |accessdate=25 January 2019}}

|2018/06/29

|Scutum

|{{RA|18|29|22.96}}

|{{DEC

14|30|44.0}}

|10.3

|Classical

|Yes

V3666 Ophiuchi{{cite web |title=CBET 4540: 20180813 : NEW NOVA IN OPHIUCHUS = PNV J17422408-2053088 |url=http://www.cbat.eps.harvard.edu/cbet/004500/CBET004540.txt |website=Central Bureau for Astronomical Telegrams |publisher=IAU |accessdate=25 January 2019}}

|2018/08/08

|Ophiuchus

|{{RA|17|42|24.10}}

|{{DEC

20|53|08.8}}

|9.0

|Classical

|No

V556 Normae{{cite web |title=CBET 4568: 20181026 : NOVA NORMAE 2018 = PNV J16143400-5330050 |url=http://www.cbat.eps.harvard.edu/cbet/004500/CBET004568.txt |website=Central Bureau for Astronomical Telegrams |publisher=IAU |accessdate=25 January 2019}}

|2018/10/13

|Norma

|{{RA|16|14|32.92}}

|{{DEC

53|30|14.7}}

|10.2

|Classical

|Yes

=In the Andromeda Galaxy=

Novae are also frequently spotted in the Andromeda Galaxy, and are even slightly more commonly found than in the Milky Way, as there is less intervening dust to prevent their detection. Furthermore, Andromeda is circumpolar for observers north of latitude +48-50, roughly the latitude of the Canadian-American border, allowing observers north of that to search for transients all year.

In 2018, 23 novae were seen in the Andromeda galaxy.

class="wikitable sortable"

!Nova name

!Discovery date

!Right ascension

!Declination

!Peak
brightness (v)

!Absolute
magnitude (v)

PNV J00444425+4142449

|2018/01/10

|{{RA|00|44|44.25}}

|{{DEC|41|42|44.9}}

|18.4

| -6.1

PNV J00431577+4118393

|2018/01/12

|{{RA|00|43|15.77}}

|{{DEC|41|18|39.3}}

|17.8

| -6.7

PNV J00423439+4044255

|2018/02/07

|{{RA|00|42|34.39}}

|{{DEC|40|44|25.5}}

|16.7

| -7.8

PNV J00415059+4125499

|2018/02/22

|{{RA|00|41|50.59}}

|{{DEC|41|25|49.9}}

|17.9

| -6.6

PNV J00424041+4112522

|2018/03/21

|{{RA|00|42|40.41}}

|{{DEC|41|12|52.2}}

|18.1

| -6.4

PNV J00425509+4119009

|2018/04/03

|{{RA|00|42|55.09}}

|{{DEC|41|19|00.9}}

|17.6

| -6.9

PNV J00421895+4113524

|2018/04/19

|{{RA|00|42|18.95}}

|{{DEC|41|13|52.4}}

|16.9

| -7.6

PNV J00415353+4114121

|2018/04/29

|{{RA|00|41|53.53}}

|{{DEC|41|14|12.1}}

|17.5

| -7.0

PNV J00434212+4122349

|2018/05/19

|{{RA|00|43|42.12}}

|{{DEC|41|22|34.9}}

|17.0

| -7.5

PNV J00424144+4117377

|2018/06/26

|{{RA|00|42|41.44}}

|{{DEC|41|17|37.7}}

|17.1

| -7.4

PNV J00414889+4109148

|2018/07/01

|{{RA|00|41|48.89}}

|{{DEC|41|09|14.8}}

|17.4

| -7.1

PNV J00420765+4119438

|2018/07/12

|{{RA|00|42|07.65}}

|{{DEC|41|19|43.8}}

|17.3

| -7.2

PNV J00425261+4118409

|2018/07/15

|{{RA|00|42|52.61}}

|{{DEC|41|18|40.9}}

|18.6

| -5.9

PNV J00425074+4115461

|2018/07/31

|{{RA|00|42|50.74}}

|{{DEC|41|15|46.1}}

|19.1

| -5.4

PNV J00424214+4114457

|2018/08/02

|{{RA|00|42|42.14}}

|{{DEC|41|14|45.7}}

|17.5

| -7.0

PNV J00392190+4015488

|2018/08/13

|{{RA|00|39|21.90}}

|{{DEC|40|15|48.8}}

|19.0

| -5.5

PNV J00451587+4210269

|2018/08/21

|{{RA|00|45|15.87}}

|{{DEC|42|10|26.9}}

|17.9

| -6.6

PNV J00424990+4123348

|2018/10/11

|{{RA|00|42|49.90}}

|{{DEC|41|23|34.8}}

|17.9

| -6.6

PNV J00424012+4117273

|2018/10/13

|{{RA|00|42|40.12}}

|{{DEC|41|17|27.3}}

|17.5

| -7.0

TCP J00420310+4102331

|2018/10/15

|{{RA|00|42|03.10}}

|{{DEC|41|02|33.1}}

|18.0

| -6.5

PNV J00424065+4111080

|2018/12/03

|{{RA|00|42|40.65}}

|{{DEC|41|11|08.0}}

|18.7

| -5.8

PNV J00424241+4119411

|2018/12/17

|{{RA|00|42|42.41}}

|{{DEC|41|19|41.1}}

|18.2

| -6.3

PNV J00432462+4120222

|2018/12/22

|{{RA|00|43|24.62}}

|{{DEC|41|20|22.2}}

|18.0

| -6.5

PNV J00424380+4117208

|2018/12/23

|{{RA|00|42|43.80}}

|{{DEC|41|17|20.8}}

|17.5

| -7.0

=In other galaxies=

Any galaxy within 20 million light-years of the Sun could theoretically have nova events bright enough to be detected from Earth, although in practice most are only detected in galaxies within 10-15 million light-years of the Milky Way, such as the Triangulum Galaxy, Messier 81, Messier 82, Messier 83, and Messier 94.

In 2018, of the ten novae observed in other galaxies than the Milky Way or the Andromeda Galaxy, eight were in Messier 81, with the remaining two from the Triangulum Galaxy and Messier 83. A luminous red nova, probably caused by the merger of two stars, occurred in NGC 45.

class="wikitable sortable"

!Nova name

!Discovery date

!Host galaxy

!Right ascension

!Declination

!Peak
brightness (v)

!Distance
(million light-years)

!Absolute
magnitude (v)

!Type

PNV J13370978-2956576

|2018/01/28

|Messier 83

|{{RA|13|37|09.78}}

|{{DEC

29|56|57.6}}

|20.7

|15.2

| -7.6

| Classical

PNV J09555926+6903517

|2018/01/30

|Messier 81

|{{RA|09|55|59.26}}

|{{DEC|69|03|51.7}}

|20.3

|11.5

| -7.4

| Classical

PNV J09545236+6904085

|2018/02/19

|Messier 81

|{{RA|09|54|52.36}}

|{{DEC|69|04|08.5}}

|20.0

|11.5

| -7.7

| Classical

PNV J09553607+6902141

|2018/03/06

|Messier 81

|{{RA|09|55|36.07}}

|{{DEC|69|02|14.1}}

|20.8

|11.5

| -6.9

| Classical

PNV J09551340+6900478

|2018/03/20

|Messier 81

|{{RA|09|55|13.40}}

|{{DEC|69|00|47.8}}

|21.2

|11.5

| -6.5

| Classical

PNV J09553194+6909147

|2018/04/02

|Messier 81

|{{RA|09|55|31.94}}

|{{DEC|69|09|14.7}}

|20.4

|11.5

| -7.3

| Classical

PNV J09555269+6858409

|2018/04/09

|Messier 81

|{{RA|09|55|52.69}}

|{{DEC|68|58|40.9}}

|20.6

|11.5

| -7.1

| Classical

AT 2018bwo

|2018/05/22

|NGC 45

| {{RA|00|14|01.72}}

| {{DEC

23|11|35.8}}

| 16.4

| 32.6

| -13.6

| Luminous Red Nova

PNV J09560988+6859108

|2018/10/12

|Messier 81

|{{RA|09|56|09.88}}

|{{DEC|68|59|10.8}}

|20.1

|11.5

| -7.6

| Classical

PNV J01334673+3032181

|2018/10/13

|Triangulum Galaxy

|{{RA|01|33|46.73}}

|{{DEC|30|32|18.1}}

|18.1

|2.65

| -6.4

| Classical

PNV J09555246+6902009

|2018/11/06

|Messier 81

|{{RA|09|55|52.46}}

|{{DEC|69|02|00.9}}

|20.0

|11.5

| -7.7

| Classical

Notes

References

External links

[https://projectpluto.com/galnovae/galnovae.txt List of all galactic novae]

Category:2018 in outer space

Category:Novae

Novae in 2018

Novae

List of novae in 2018

List of novae in 2018

=In the Milky Way=

=In the Andromeda Galaxy=

=In other galaxies=

See also

Notes

References

External links