The Result of Daytime Sextantids

2020-11-30

Sextantids shows activity around 27th September (λ_⊙=184°.3) by International Meteor Organization(IMO). Long term activity profile using Radio Meteor Observations (this project) caught this activity around λ_⊙=188°.8 (peak time was later than IMO data). On the other hand, however, estimated activity level (Activity Level=0.3) was weaker comparing with background level(background level = 0.0±0.4). Therefore it has a possibility to change estimated profile data.

Results of Sextantids every year

Year	Source	Result
2019	WorldWide	Stronger activity around λ⊙=187°.5 – 189°.
2018	WorldWide	Activity level was same as annual year. The estimated peak was λ⊙=188°.
2017	WorldWide	Activity level was same as annual year. The estimated peak was λ⊙=188°.5.
2016	WorldWide	Weaker activity level than annual year. Activity profile was unclear.
2015	WorldWide	Weak activity. Activity level was same as daily background activity.
2014	WorldWide	The higher activity level around λ⊙=188°.5.
2013	WorldWide	The main activity was later, around λ⊙=188°.5 – 190°.
2012	WorldWide	Very weak activity. It was impossible to see the activity.
2011	WorldWide	Activity Level was higher. The clear activity was around λ⊙=187° – 189°.
2010	WorldWide	Calculated data had a wide error-bars. Peak was around λ⊙=187°.5 ?
2009	WorldWide	The activity level was same as background activity. (λ⊙=186°.8 ?)
2008	WorldWide	Main activity was around λ⊙=187°-190°. Activity level was same as annual.
2007	WorldWide	Weaker activity. The peak was around λ⊙=188°.5.
2006	WorldWide	The activity was weak. Estimaetd peak activity was λ⊙=188°.5. (not clear)
2005	WorldWide	Higher activity level was observed around λ⊙=188°.

Long Term Activity Profile

source	Solar Longitude	FWHM	Peak Activity Level
2005-2019	188°.8	-2°.1 / +2°.2	0.3
2005-2015	189°.0	-2°.3 / +1°.8	0.3
2010-2019	189°.0	-2°.2 / +2°.2	0.3

Information of Daytime Sextantids

Introduction of Daytime Sextantids