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coelum.com

https://coelum.com· First analyzed 19 May 2026· Updated 19 May 2026
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coelum.com
Desktop screenshot of coelum.com
Mobile screenshot of coelum.com
Mobile

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Hosting Provider

Hetzner
hetzner.com

IP Address

135.181.118.219

Site Location

🇫🇮 Finlandvia ip

Server Location

🇫🇮 Helsinki, Finland

ASN

AS24940

Organization

Hetzner

Server

Nginx

CDN

CDN

Nameservers

beau.ns.cloudflare.com.dawn.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
615 ms10%
Speed Index
800 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
4.6 MB
123 requests

Image Optimization

Lazy LoadWebPResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
WordPressv6.9.4
cms
Newsmagv5.4.3.5Custom
by tagDiv
View Theme

Technology Stack

18 Technologies Detected

Plugins

11
Inpost International
WooCommerce
Asgaros ForumCoelum SottotitoloSimple MembershipComplianz GdprTd ComposerMatomo
Woocommerce Gateway Stripe
Woocommerce Paypal Payments
Adrotate

Libraries

2
jQuery
jQuery UI

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Font Awesome

Fonts

1
Google Fonts

Analytics

1
Matomo

Web Servers

1
Nginx

SEO Analysis

B78/100
23
6
1
Meta Tags15/15
Content10/12
Headings8/8
Technical21/25
E-E-A-T0/7
Images4/7
Links5/5
URL5/5
Social2/5
Freshness2/4
Mobile3/4
Indexability3/3
C
coelum.comcoelum.com

Coelum Astronomia | Da oltre 25 anni tutta l'Astronomia

[tdc_zone type="tdc_content"][vc_row][vc_column][td_block_list_menu inline="yes" item_space="20" menu_id="26689" item_horiz_align="content-horiz-center" color_p

Title Length55 chars

Recommended: 50-60 chars (~331px / 580px)

Description Length160 chars

Recommended: 120-160 chars

Issues (1)

  • • Most images missing alt text (97/134) — critical for accessibility and SEO

7 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

36 URLs

36 sub-sitemaps

robots.txt

4 rules

Sitemap reference found

Local SEO

Local Search Readiness

9/100
Poor
3 12 2

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

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AI & LLM Readiness

F32/100
Bot Access
20/25
Machine Read.
0/25
Schema Data
0/25
Citation
12/25

AI Bot Access

14/14 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:6%
Words:5,149
Token eff.:Excessive

Structured Data

Microdata

Citation Readiness

Opening Summary913w
Descriptive Headingsavg 9.2w
Canonical URL
Open Graph1/3
Twitter Card1/3
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.
B
71/100
13
Passed
6
Critical
1
Warnings
Images & Alt Text
13/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
11/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
10/15
Verifies form fields have labels, error messages are clear, and inputs are properly associated.
Color & Contrast
14/15
Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
Keyboard & Focus
11/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
12/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
3 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.
28/100
F
472 mg
CO₂e / view
4.6 MB
Page Weight
15%
Cleaner Than
New Visitor
540 mg
vs
Returning (cached)
270 mg
Annual (10K/mo)
56.7 kg
Emission Segments
Data Center
23 mg
Network
139 mg
Device
310 mg
Resource Breakdown
JavaScript
420.9 KB
Images
920.2 KB
CSS
3.2 MB
Fonts
2.2 KB
HTML
67.4 KB
Other
1.3 KB
Green Hosting Verified
Hetzner Online GmbH
GWF Verified
7 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

0%Critical
Critical / Transactional

HTTPS

No WAF

59d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

19.04.2026

Valid Until

18.07.2026

Subject Alternative Names (2)

coelum.comwww.coelum.com

SHA-256 Fingerprint

5B:D1:A1:F9:22:2B:E9:62:CD:35:43:30:B9:D4:05:03:8B:50:B6:F4...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

age
807
alt-svc
h3=":443"; ma=86400, h3-29=":443"; ma=86400
cache-control
🔴 No Cache(no-store, no-cache, must-revalidate)
content-encoding
zstd
content-type
text/html; charset=UTF-8
date
Tue, 19 May 2026 12:13:32 GMT
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

45

SPF
DKIM
DMARC

MX Records (1)

mta-gw.infomaniak.ch

Domain Information

coelum.com

Domain Age
28y 8m

Created

01.09.1997

Expires

31.08.2026

Last Updated

09.03.2026

Registrar

Internet Domain Service BS Corp

DNSSEC
Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner
Cookiebot
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
CMP: Cookiebot
Privacy policy page linked
Data Protection Officer mentioned

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.
B
77/100
Mobile Friendly18 breakpoints
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.
Viewport
width=device-width, initial-scale=1.0
1 recommendation
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Verdana

WCAG Partial
52/100
Readability
/30
13/30

13px · LH 1.62

Hierarchy
/20
7/20

1x ratio

WCAG
/25
16/25

1.97:1 min contrast

Performance
/25
16/25

System fonts

Heading Font

Verdana

Sans13px

Body Font

Verdana

Sans13px

Contrast Ratio

1.97:1

13 issues

Reading Comfort

~47 CPL

Optimal (45–75)
13px
h1
27px
h2
24px
h3
19px
h4
13px
p
Minor Third
Scale

❌ Critical: 13px body text is too small. Minimum 14px, recommend 16px+.

✅ Optimal line length: ~47 chars/line (ideal 45–75 CPL).

❌ Very complex text: Flesch score 0/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 13 elements below WCAG AA threshold (min 2.0:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

⚠️ Weak hierarchy: Headlines should be ≥2x body size for clear visual structure.

GGoogle FontsBuy on MyFontsFlesch 0

Color Palette

11 unique colors
2.2:1 Fail Light
#ffffff
Background· 59.60000000000001%
#aeb0a1
Secondary· 3.6%
#010b1b
Primary· 8.6%
#3a5e70
Primary· 6.3%
#2b2e37
Secondary· 4.7%
#988066
Secondary· 2.8%
#10263e
Accent· 2.6%
#fae68b
Accent· 2.5%

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

2
Matomo (Piwik)Mid-Market
Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

1
ComplianzSMB

Cookie consent and privacy compliance tools

2

Categories

3

Total Tools

0

Enterprise

1

Mid-Market

Assessment: Well-developed marketing technology stack

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Scripts & Styles

30 Resources

20
Scripts
10
Styles
4
Async
4
Defer

Top Script Sources

coelum.com(17)youtube.com(1)cdnjs.cloudflare.com(1)maps.googleapis.com(1)

Website Identity

coelum.com

28 years old
Location detected: 🇫🇮 Finlandvia ip
Internet Domain Service BS Corpit-IT

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Last analyzed: 19 May 2026 at 12:13

Historical Analysis & Change Tracking