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ESA Science engagement report

@esascience - 418K followers on X

Measured over 46 original posts from a 30-day window, last computed on August 30, 2026.

Engagement

Middle of its size range
Per follower
0.013%
of 418K followers
Per impression
0.904%
6.2K views on a typical post
Reach
1.50%
of its followers see a post
Typical post
56
interactions (median)
Saved
0.048%
3 bookmarks on a typical post
Posting rate
1.73/day
active 47% of days
Peak time
18:00 UTC
Wednesday

A typical post picks up 56 interactions against 418K followers, an engagement rate of 0.013%. Measured over 46 original posts, its engagement rate beats 35% of 3,810 tracked accounts of a similar size, which puts it in the middle of its size range rather than at either end. Posts are seen about 6.2K times each, and 0.904% of those impressions turn into an interaction. That is about 1.50% of the follower count, which is the gap between an audience on paper and an audience in a timeline. Posting runs at about 1.7 posts a day over the last 30 days, with activity on roughly 47% of days. Most posts go out around 18:00 UTC, and Wednesday is the busiest day of the week. Of the 46 posts sampled, 87% carry an image or video, 7% are part of a thread and 59% link out. The account's strongest tracked post pulled 278 interactions, about 5.0x its own typical post. Recurring topics include #europeansolareclipse, #bepicolombo, #cluster.

Measured over 46 original posts from a 30-day window, last computed on August 30, 2026. Recurring tags: #europeansolareclipse, #bepicolombo, #cluster.

Compared with accounts its own size

ESA Science's engagement rate beats 35% of the tracked X accounts closest to it in follower count (3,810 accounts, accounts of similar size (decile 7 of 10)). A percentile is spread evenly by construction, so 50 really is the middle of that group and 90 really is its top tenth.

On engagement per impression rather than per follower it beats 48% of the same group. When those two numbers disagree, the gap is about how far its posts travel rather than how people react to them.

Where this sits in the catalog

At 0.013%, ESA Science sits above the 25th percentile of the 36,960 accounts in this comparison. That places it in the below the median band, which runs 0.012% to 0.08%.

p100.002%
p250.012%
p50 (median)0.08%
p750.435%
p902.10%
p99159.8%
Engagement rate as a share of followers, across the 36,960 accounts we have scanned enough to measure. The axis is logarithmic, because the top and bottom of this population are about 106,518 times apart and a linear axis would flatten everything below the median into a single point.
Show the percentile table
Engagement rate percentiles
PercentileEngagement rate
10th percentile0.002%
25th percentile0.012%
50th percentile0.08%
75th percentile0.435%
90th percentile2.10%
99th percentile159.8%

This ruler is the whole measured catalog, not a size-matched group: it shows where the raw rate falls across every account we can measure, all of which are large. For a like-for-like comparison, read the size-band percentile above instead. See how the bands are built

Posting timing

This account posts most often around 18:00 UTC, and Wednesday is its busiest day of the week. The bars below are the catalog-wide pattern, with this account's own busiest slot marked. They do not show how this account performs at each hour: we keep one aggregate per account, not one per hour, so that measurement does not exist in our data.

Engagement by hour posted, UTCTwenty-four bars, one per UTC hour. Each bar shows how posts published in that hour compare with their own authors' median engagement. Bars above the centre line ran higher than the median, bars below ran lower. A marker flags Busiest hour: 18:00 UTC.
0003060912151821
Above the authors' own mediansBelowScale: plus or minus 6%Busiest hour: 18:00 UTC
Show engagement by hour posted, utc as a table
Engagement by hour posted, UTC
Hour (UTC)Vs author medianPosts
00:00 UTC-1%51K
01:00 UTC-2%52K
02:00 UTC-3%51K
03:00 UTC-4%54K
04:00 UTC-6%44K
05:00 UTC-4%42K
06:00 UTC-4%49K
07:00 UTC-5%53K
08:00 UTC-4%61K
09:00 UTC-3%70K
10:00 UTC-2%73K
11:00 UTC-3%79K
12:00 UTC-2%87K
13:00 UTC-2%96K
14:00 UTC-4%99K
15:00 UTC-2%102K
16:00 UTC-3%99K
17:00 UTC-2%92K
18:00 UTC-1%85K
19:00 UTC-2%80K
20:00 UTC-1%75K
21:00 UTC-1%67K
22:00 UTC-2%58K
23:00 UTC-1%52K
Engagement by day of weekSeven bars, one per weekday, Sunday first. Each bar shows how posts published on that day compare with their own authors' median engagement. Bars above the centre line ran higher than the median, bars below ran lower. A marker flags Busiest day: Wednesday.
SunMonTueWedThuFriSat
Above the authors' own mediansBelowScale: plus or minus 5%Busiest day: Wednesday
Show engagement by day of week as a table
Engagement by day of week
DayVs author medianPosts
Sunday+5%233K
Monday0%292K
Tuesday-3%284K
Wednesday-1%253K
Thursday-2%246K
Friday-3%255K
Saturday+3%229K
See what moves engagement across the whole catalogWhat counts as a good engagement rate at this size

Best tweets

  • Aug 9, 20265.0x their median

    How many eclipse types can you claim?  Take the quiz and let us know how many points you got! 👇 Credit: M. West #EuropeanSolarEclipse https://t.co/TKY9tR00ZI

    1955321915K viewsView on X
  • Aug 25, 20263.7x their median

    T – 5️⃣ days to @NASARoman launch day    Like @ESA_Euclid, Roman will study : ✔️ dark matter ✔️dark energy & expansion of the Universe ✔️exoplanets Read more 👉 https://t.co/uxxQNhyZLC https://t.co/bakWIMb5Rs

    16040619.4K viewsView on X
  • Aug 19, 20263.7x their median

    ☕ Grab a cup of coffee, sit back, relax, and enjoy a flight around Mars's Schiaparelli Crater (you might want to go full screen and volume on for this one!) Thanks to our #MarsExpress for this stunning view of the Red Planet. More information here 👉 https://t.co/lkyDuuJhvv https://t.co/UM9jiRC1iv

    160385315K viewsView on X
  • Aug 27, 20263.6x their median

    Mercury, here we go! ☀️🌑🛰️ Watch @esa /@JAXA_en @BepiColombo MTM separation live on 3 September and witness the first critical step in a never-before-seen planetary arrival. 💫 Click here for more info 👉 https://t.co/G2B4eR9ka2 @esascience #BepiColombo #Mercury https://t.co/P9zmqBYUku

    154392433K viewsView on X
  • Aug 12, 20263.4x their median

    Did you catch the eclipse today? 📸 Whether it was full totality or just a sliver of shadow, we want to see it. Share your photos and impressions with #EuropeanSolarEclipse 👇 https://t.co/QimuoG8LtY

    14737626.8K viewsView on X
  • Aug 12, 20263.3x their median

    DYK? An eclipse in 1919 helped prove Einstein's General Theory of Relativity. More than 100 years later, that same theory is allowing us to explore the Universe in an entirely new way – chasing gravitational waves, ripples in the very fabric of space-time. 1/2 #EuropeanSolarEclipse

    15727105.5K viewsView on X
  • Aug 12, 20262.8x their median

    First contact 🌗 The Moon has just started sliding across the Sun. Totality is still about one hour away but here we go! #EuropeanSolarEclipse https://t.co/71KKZNXyCd

    11635358.1K viewsView on X
  • Aug 11, 20262.6x their median

    Webb has discovered that water and dust can survive in the extreme environment around the supermassive black hole at the centre of our Milky Way galaxy 💧🕳️ Read more 👉 https://t.co/Vje1YVcFbh https://t.co/rIgrXERUTS

    11923406.7K viewsView on X
  • Aug 12, 20262.5x their median

    Is this an artificial solar eclipse? 😵 Yes, this 2025 image is from Proba-3, the world's first precision formation flying mission 👉 https://t.co/NdUmaJzkhd Two spacecraft recreate a solar eclipse in space, every 19.6-hour orbit. That's eclipses on demand!  #EuropeanSolarEclipse

    116172410K viewsView on X
  • Aug 12, 20261.8x their median

    The good news? This isn't goodbye. Two more solar eclipses are heading for Europe: a total one in 2027, an annular one in 2028. That's right, it's #EclipsesOnTourInEurope. Start planning! #EuropeanSolarEclipse https://t.co/OQt6SpoOf1

    75191520K viewsView on X

Ranked by total interactions across everything we have tracked for this account, which is a longer history than the 30-day window the rates above use. The multiple compares each post to this account's own median.

Recurring topics

#europeansolareclipse#bepicolombo#cluster#eclipsesontourineurope#marsexpress

The most frequent hashtags in the sampled posts. They describe what this account writes about; they are not a performance signal, and the catalog-wide breakdown on the hub shows how little hashtag count moves.

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Reading these numbers

A typical post picks up 56 interactions against 418K followers, an engagement rate of 0.013%. Measured over 46 original posts, its engagement rate beats 35% of 3,810 tracked accounts of a similar size, which puts it in the middle of its size range rather than at either end. Posts are seen about 6.2K times each, and 0.904% of those impressions turn into an interaction. That is about 1.50% of the follower count, which is the gap between an audience on paper and an audience in a timeline. Posting runs at about 1.7 posts a day over the last 30 days, with activity on roughly 47% of days. Most posts go out around 18:00 UTC, and Wednesday is the busiest day of the week. Of the 46 posts sampled, 87% carry an image or video, 7% are part of a thread and 59% link out. The account's strongest tracked post pulled 278 interactions, about 5.0x its own typical post. Recurring topics include #europeansolareclipse, #bepicolombo, #cluster.

What is ESA Science's engagement rate on X?
ESA Science (@esascience) has an engagement rate of 0.013%, based on the median interactions across 46 original posts from the last 30 days against 417,581 followers. Replies, reposts and quote-posts of other people are excluded from that sample.
Is that a good engagement rate?
At 0.013%, ESA Science sits above the 25th percentile of the 36,960 accounts in this comparison. Those comparison accounts are all large ones, because our scanning cadence is weighted towards big accounts, so this is a ranking among peers of similar scale rather than a ranking across X.
Does @esascience have real engagement?
Its engagement rate beats 35% of the tracked X accounts closest to it in follower count (3,810 accounts), which puts it in the middle of its size range group. Ranking inside a size band matters because engagement rate falls as accounts grow, so a raw rate would mostly re-measure the follower count. It is a starting point for a look at follower quality, not a verdict on it.
When does @esascience post?
Most posts go out around 18:00 UTC, and Wednesday is its busiest day, at roughly 1.73 posts per day across the measured window.

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