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News and Announcements
Monday, October 7, 2019 - 09:44
LPV of the Month - October 2019 - V CrB
Thursday, September 26, 2019 - 16:05
Journal of the AAVSO May Be Innovative Experience with New Editor, Nancy Morrison
Friday, September 20, 2019 - 10:59
Solar Bulletin - Volume 75, Number 08
Wednesday, September 18, 2019 - 13:06
Alert Notice 680: Monitoring of J0139 (ZTF J013906.17+524536.89) requested - corrected
Wednesday, September 18, 2019 - 12:43
Alert Notice 681: Photometry of more symbiotic candidates requested
Monday, September 16, 2019 - 19:22
Alert Notice 679: Nova in Scorpius: N Sco 2019 No. 2 = PNV J17370958-3510211
Wednesday, September 11, 2019 - 10:08
Alert Notice 678: V694 Mon (MWC 560) photometry and spectroscopy requested
Wednesday, August 28, 2019 - 12:21
Alert Notice 677: Recurrent nova V3890 Sgr in outburst
Friday, August 16, 2019 - 12:01
Announcing Candidates for the 2019 Council Election
Wednesday, August 14, 2019 - 18:46
Alert Notice 676: Nova in Orion: N Ori 2019 = PNV J06095740+1212255
Monday, August 12, 2019 - 17:31
Solar Bulletin: Volume 75, Number 07
Friday, August 2, 2019 - 14:03
Alert Notice 675: V386 Ser - second rescheduling of HST observations
Thursday, July 25, 2019 - 11:31
Alert Notice 674: UU Aqr being observed with Chandra
Thursday, July 25, 2019 - 10:12
Alert Notice 673: SS Cyg photometry and spectroscopy requested to complement TESS monitoring
Friday, July 19, 2019 - 14:09
Alert Notice 672: Monitoring needed of KIC 8462852 (Tabby's Star)
Tuesday, July 16, 2019 - 21:40
Solar Bulletin: Volume 75, Number 6
Friday, July 12, 2019 - 15:33
Alert Notice 671: LQ Peg being observed with Chandra
Tuesday, July 9, 2019 - 15:11
Alert Notice 670: KIC 2856960 time series coverage needed now
Tuesday, July 2, 2019 - 10:07
JAAVSO volume 47, number 1, June 2019, print version now available
Friday, June 21, 2019 - 13:42
Alert Notice 669: V386 Ser HST observations rescheduled
Friday, June 21, 2019 - 13:03
Alert Notice 668: V1047 Cen (Nova Cen 2005) rebrightening
Monday, June 17, 2019 - 11:08
Solar Bulletin - Volume 75, Number 5
Saturday, June 15, 2019 - 00:20
JAAVSO Volume 47 Number 1, 2019 is published
Friday, June 14, 2019 - 13:30
Charts and Sequences Update - June 2019
Monday, May 20, 2019 - 16:47
Alert Notice 667: V386 Ser to be observed with HST
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About Us
The Organization
Vision/Mission
Services
What We Do
History and Archives
Volunteer
Funds
Contact Us
By-Laws
The People
Board: Officers and Members
Staff
Section Leaders
Honors & Awards
In Memoriam
Outreach
Presentation Library
The Location
AAVSO Headquarters
Directions
Guest Suite
Our Publications
Annual Report
Journal of the AAVSO
AAVSO Newsletter
Solar Bulletin
plus many more...
Apply for Membership
Renew Membership
Community
Meetings
Forums
Find a Member/Observer
Who's Online
Variable Stars
What Are They & Why Observe Them?
The Stories Variables Tell
Types of Variable Stars: A Guide for Beginners
Educational Materials
CHOICE Online Institute
CCD School Videos
Student Projects
Variable Star Astronomy
H-R Diagram Plotting Activity
Reporting Variable Star Discoveries
Variable Star Index (VSX)
AAVSO in Print - Publications Using AAVSO Data
Observing
Observing at a Glance
Observing Sections
Alert Notices & Observing Campaigns
Observing Manuals
Visual Observing Manual
Charge-Coupled Device (CCD) Camera Photometry Guide
Digital Single Lens Reflex (DSLR) Camera Observing Manual
Exoplanet Observing Guide
PEP Observer's Guide
Solar Observing Guide
AAVSO Guide to Getting Started in Spectroscopy
WebObs (Search AID or Submit Your Data)
Variable Star Charts
Variable Star Plotter (VSP)
Report Chart Errors
Request Comparison Stars
Chart and Sequence Updates
AAVSO Target Tool
Observation Planner Tool
JD Calculator & Calendar
Software Directory
Data
For researchers: support and data access
AAVSO International Database (AID)
WebObs (Submit/Search Data)
Exoplanet Database
Data Access
Download Data in ASCII Form
Light Curve Generator (LCGv2)
Light Curve Generator (LCGv1)
MyNewsFlash - Real-Time Data Delivery
WebObs Search (Search the AID)
Data Analysis
Transformation
VPHOT - Online Photometry Tool
Zapper - Help Validate Data
VStar - Java Visualization & Analysis Tool
Historic Light Curves
The AAVSO Photometric All-Sky Survey (APASS)
AAVSOnet Epoch Photometry Database
AAVSOnet
Eggen Card Project
Getting Started
What Are Variable Stars?
Things to Do
Find a Mentor
Online Forum for Help and Advice
Observing Tutorials
10-Star Tutorial (Visual Observations of Variable Stars)
5-Star Tutorial (Data Analysis)
Observing Sections
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