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News and Announcements
Friday, January 24, 2020 - 18:07
Alert Notice 693: V582 Mon monitoring requested
Wednesday, January 22, 2020 - 15:28
Alert Notice 692: V694 Mon (MWC 560) to be observed with Chandra
Monday, January 13, 2020 - 21:35
Solar Bulletin - Volume 75, Number 12
Wednesday, January 8, 2020 - 11:24
Alert Notice 691: Request for immediate photometric monitoring of the fading star ASASSN-V J060000.76-310027.83
Monday, January 6, 2020 - 16:36
Alert Notice 690: Rare very faint minimum of Betelgeuse (alpha Ori)
Friday, January 3, 2020 - 14:14
Alert Notice 689: R Aqr monitoring needed in support of HST and Chandra observations
Monday, December 30, 2019 - 08:50
LPV of the Month - January 2020 - RS Cnc
Friday, December 27, 2019 - 10:51
JAAVSO volume 47, number 2, December 2019, print version now available
Friday, December 20, 2019 - 13:11
Alert Notice 688: Anticipated primary eclipse of b Persei in January 2020
Wednesday, December 18, 2019 - 13:32
JD Calendar for 2020
Monday, December 16, 2019 - 12:15
Solar Bulletin - Volume 75, Number 11
Sunday, December 15, 2019 - 09:02
JAAVSO Volume 47 Number 2, 2019 is published
Wednesday, December 4, 2019 - 14:08
Alert Notice 687: LPV Maser campaign extended through October 2020
Tuesday, November 26, 2019 - 08:09
LPV of the Month - December 2019 - Y Per
Tuesday, November 19, 2019 - 14:46
Alert Notice 686: B-band photometry of TYC 2597-735-1 urgently needed
Friday, November 8, 2019 - 11:59
AAVSO Alert Notice 685: EM Cyg monitoring requested
Wednesday, November 6, 2019 - 10:45
The American Association of Variable Star Observers Selected to Participate in Harvard Business School Association of Boston’s Community Action Partners Program
Friday, November 1, 2019 - 13:45
Alert Notice 684: Photometry requested for campaign on V1491 Cyg
Friday, November 1, 2019 - 11:33
Alert Notice 683: Nova in Scutum = V659 Sct (N Sct 2019 = ASASSN-19aad, TCP J18395972-102541)
Thursday, October 31, 2019 - 09:41
LPV of the Month - November 2019 - TX Psc
Wednesday, October 23, 2019 - 16:58
AAVSO Contributors Honored
Wednesday, October 23, 2019 - 13:07
Increase Astronomical Discoveries by Storing Your Spectroscopic Observations with AVSpec
Thursday, October 17, 2019 - 11:02
Solar Bulletin - Volume 75, Number 9
Wednesday, October 16, 2019 - 18:16
Alert Notice 682: Observing campaign on Polars
Monday, October 14, 2019 - 14:59
Data Milestone Achieved in AAVSO’s Variable Star Repository, VSX
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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
AAVSO
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aavso@aavso.org
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