astronomerstelegram.org

https://astronomerstelegram.org· First analyzed 05 May 2026· Updated 05 May 2026

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Mobile

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Hosting Provider

Leaseweb

leaseweb.com

IP Address

174.142.199.243

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Montreal, Canada

ASN

AS32613

Organization

iWeb Technologies Inc

Server

Apache

Nameservers

ns1.dotster.com.ns2.dotster.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

599 ms10%

Speed Index

779 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

263 KB

12 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Leaseweb

Progressive Web App

Web ManifestApple Touch Icon

Technology Stack

5 Technologies Detected

Analytics

Web Servers

Languages

SEO Analysis

D47/100

Meta Tags4/15

Content12/12

Headings0/8

Technical9/25

E-E-A-T3/7

Images1/7

Links4/5

URL5/5

Social2/5

Freshness0/4

Mobile4/4

Indexability3/3

astronomerstelegram.orgastronomerstelegram.org

The Astronomer's Telegram

No description available for this page.

Title Length25 chars

Recommended: 50-60 chars (~156px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (4)

• Missing meta description — important for click-through rates in SERPs
• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (3/5) — critical for accessibility and SEO

12 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

8 rules

Local SEO

Local Search Readiness

0/100

Poor

15 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

Sponsored

AI & LLM Readiness

F16/100

Bot Access

4/25

Machine Read.

10/25

Schema Data

0/25

Citation

2/25

AI Bot Access

1/14 accessible

AI Search

OAI-SearchBot

PerplexityBot

Claude-SearchBot

Gemini-Deep-Research

DuckAssistBot

Training

GPTBot

ClaudeBot

Google-Extended

Meta-ExternalAgent

Bytespiderinfo

Amazonbot

Applebot-Extended

CCBotinfo

Fetch

ChatGPT-User

Machine Readability

llms.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

Text ratio:30%

Words:1,326

Token eff.:Optimal

Structured Data

No Schema

Citation Readiness

Opening Summary

Descriptive Headings

Canonical URL

Open Graph1/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (12)

AI readiness recommendation preview...

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Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.

38/100

Passed

Critical

Warnings

Images & Alt Text

5/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

3/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

5/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

15/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

9/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

1/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

5 recommendations

•Accessibility recommendation preview...

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Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.

62/100

A+

27 mg

CO₂e / view

262.9 KB

Page Weight

95%

Cleaner Than

New Visitor

30 mg

Returning (cached)

15 mg

Annual (10K/mo)

3.2 kg

Emission Segments

Data Center

1 mg

Network

8 mg

Device

17 mg

Resource Breakdown

Images

232.1 KB

CSS

5.4 KB

HTML

25.3 KB

Green Hosting Verified

Leaseweb

Provider Match

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

34d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

10.03.2026

Valid Until

08.06.2026

Subject Alternative Names (2)

astronomerstelegram.orgwww.astronomerstelegram.org

SHA-256 Fingerprint

92:73:AF:75:DD:07:3E:98:EE:75:D0:46:03:77:EC:F6:25:7C:20:41...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

connection

Keep-Alive

content-type

text/html; charset=utf-8

date

Tue, 05 May 2026 02:34:27 GMT

keep-alive

timeout=5, max=100

server

Apache/2.4.6 (CentOS) OpenSSL/1.0.2k-fips PHP/5.4.16

transfer-encoding

chunked

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

mx.astronomerstelegram.org

Domain Information

astronomerstelegram.org

Domain Age

22y 6m

Created

10.11.2003

Expires

10.11.2029

Last Updated

05.05.2025

Registrar

Tucows Domains Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.

41/100

Not Mobile Friendly

Viewport Meta

The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.

Responsive Design

Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.

Touch Icons

Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.

Readable Font Size

Base font size should be at least 16px on mobile to ensure text is readable without zooming.

Relative Units

Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.

No H-Scroll Risk

No elements wider than the viewport that would cause horizontal scrolling on mobile devices.

Tap Targets OK

Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.

No Fixed Widths

No elements with fixed pixel widths that could overflow on smaller screens and break the layout.

4 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Helvetica

WCAG Fail

50/100

Readability

/30

12/30

9px · LH 1.30

Hierarchy

/20

9/20

WCAG

/25

15/25

1:1 min contrast

Performance

/25

14/25

1 font

Heading Font

Helvetica

Body Font

Helvetica

Sans9px

Contrast Ratio

1:1

50 issues

Reading Comfort

Single Family

left aligned

9px

❌ Critical: 9px body text is too small. Minimum 14px, recommend 16px+.

⚠️ Tight line spacing (1.30). Increase to 1.4–1.6 for better readability.

❌ Low contrast: 50 elements fail WCAG AA (min 1.0:1). Increase text/background contrast.

✅ Lean font stack: 1 font families keeps load times fast.

⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

Buy on MyFontsFlesch 54

Color Palette

9 unique colors

20.12:1 AAA Dark

#000000

Background· 77.1%

#fafafa

Background· 2.4%

#1b1617

Primary· 5.1%

#7a3a3c

Secondary· 3.2%

#3e191c

Secondary· 1.8%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

5 Resources

Scripts

Styles

Async

Defer

Top Script Sources

google-analytics.com(1)gstatic.com(1)googletagmanager.com(1)google.com(1)

Website Identity