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HUBBLE engagement report

@HUBBLE_space - 924K followers on X

Measured over 10 original posts from a 30-day window, last computed on October 20, 2026.

Engagement

Middle of its size range
Per follower
0.103%
of 924K followers
Per impression
3.54%
27K views on a typical post
Reach
2.91%
of its followers see a post
Typical post
953
interactions (median)
Saved
0.19%
51 bookmarks on a typical post
Posting rate
0.67/day
active 30% of days
Peak time
12:00 UTC
Thursday

A typical post picks up 953 interactions against 924K followers, an engagement rate of 0.103%. Measured over 10 original posts, its engagement rate beats 71% of 20,182 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 27K times each, and 3.54% of those impressions turn into an interaction. That is about 2.91% of the follower count, which is the gap between an audience on paper and an audience in a timeline. Posting runs at about 0.67 post a day over the last 30 days, though only 30% of days saw any activity at all. Most posts go out around 12:00 UTC, and Thursday is the busiest day of the week. Of the 10 posts sampled, 100% carry an image or video, 70% are part of a thread and 30% link out. The account's strongest tracked post pulled 4.1K interactions, about 4.3x its own typical post.

Measured over 10 original posts from a 30-day window, last computed on October 20, 2026. Recurring tag: #hubbletopimage.

Compared with accounts its own size

HUBBLE's engagement rate beats 71% of the tracked X accounts closest to it in follower count (20,182 accounts, accounts of similar size (decile 10 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 83% 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 0.103%, HUBBLE sits above the 25th percentile of the 204,424 accounts in this comparison. That places it in the below the median band, which runs 0.024% to 0.143%.

p100.004%
p250.024%
p50 (median)0.143%
p750.677%
p902.55%
p9982.4%
Engagement rate as a share of followers, across the 204,424 accounts we have scanned enough to measure. The axis is logarithmic, because the top and bottom of this population are about 22,888 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 percentile0.004%
25th percentile0.024%
50th percentile0.143%
75th percentile0.677%
90th percentile2.55%
99th percentile82.4%

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 12:00 UTC, and Thursday 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: 12:00 UTC.
0003060912151821
Above the authors' own mediansBelowScale: plus or minus 111%Busiest hour: 12:00 UTC
Show engagement by hour posted, utc as a table
Engagement by hour posted, UTC
Hour (UTC)Vs author medianPosts
00:00 UTC-1%89K
01:00 UTC-2%90K
02:00 UTC-3%88K
03:00 UTC-4%94K
04:00 UTC-5%76K
05:00 UTC-4%75K
06:00 UTC-5%86K
07:00 UTC-5%93K
08:00 UTC-4%108K
09:00 UTC-4%124K
10:00 UTC-3%129K
11:00 UTC-3%141K
12:00 UTC-3%154K
13:00 UTC-3%167K
14:00 UTC-4%173K
15:00 UTC-2%176K
16:00 UTC-3%171K
17:00 UTC-3%159K
18:00 UTC-2%149K
19:00 UTC-2%141K
20:00 UTC-1%131K
21:00 UTC0%116K
22:00 UTC-2%100K
23:00 UTC-1%90K
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: Thursday.
SunMonTueWedThuFriSat
Above the authors' own mediansBelowScale: plus or minus 111%Busiest day: Thursday
Show engagement by day of week as a table
Engagement by day of week
DayVs author medianPosts
Sunday+5%393K
Monday+1%483K
Tuesday-2%520K
Wednesday-3%472K
Thursday-2%430K
Friday-3%447K
Saturday+2%393K
See what moves engagement across the whole catalogWhat counts as a good engagement rate at this size

Formats this account uses

Its own posting mix on the left, and what each of those formats does across every account we track on the right. Only formats where the effect clears our publish test appear here, so an empty row is a format we could not measure rather than one that does nothing.

This account's posting mix compared with catalog-wide effects
FormatThis accountCatalog effect95% intervalAccounts behind it
Image or video100% of posts+111%+108% to +115%34K
Outbound link30% of posts-41%-42% to -40%32K
Typical length-+15%+14% to +16%32K
  • 100% of this account's sampled posts carry an image or video. Across the catalog, posts with an image or video run 111% above the same accounts' other posts.
  • 30% of its posts carry a link off X. Across the catalog, posts with an outbound link run 41% below the same accounts' other posts.
  • Its average post runs 283 characters, which falls in the over 280 characters band. Across the catalog, posts over 280 characters run 15% above the same accounts' other posts.

These are catalog-wide differences applied to this account's own posting mix, not a measurement of how each format performs for this account specifically. We keep one median per account, not one per format per account, so the second thing is not something this data can tell you.

Best tweets

  • Sep 2, 20264.3x their median

    🆕 Hubble has spotted a decagon at Saturn’s south pole! 🪐 For more than 40 years, astronomers have been watching the hexagonal jet pattern 🌬️ on Saturn’s north pole. Now, they have discovered another pattern, on the planet’s south pole. 1/2 https://t.co/hAae3AGViI

    3.4K5612553188K viewsView on X
  • Sep 17, 20262.5x their median

    Our #HubbleTopImage features a detail of the Eagle Nebula This 9.5 light-years-tall structure of billowing gas and dark, obscuring dust is just one small portion of the Eagle Nebula! Hot young stars are sculpting the nebula’s hydrogen gas into fantastical shapes like these. 1/2 https://t.co/TML6IqlTUL

    2.0K295191343K viewsView on X
  • Sep 3, 2026

    Our ESA/Hubble Picture of the Month visits a superbubble scene! The Large Magellanic Cloud is the largest of the small galaxies that orbit the Milky Way. At just 160,000 light-years away, it offers a close look at nebulae like this one, LHA 120-N44, or N44 for short. 1/3 https://t.co/ggo12KOYnz

    1.1K17918332K viewsView on X
  • Jul 9, 2026

    Our #HubbleTopImage features the Carina Nebula! This image highlights a small portion of the nebula, one of the largest observable regions of starbirth 👶⭐ in our Milky Way galaxy. Here, we see the top of one of a pillar of gas and dust, three light-years tall. 1/2 https://t.co/3617qFwnsf

    1.1K20624629K viewsView on X
  • Apr 24, 2026

    Flying through the Trifid Nebula! This video ‘floats’ through the ridges of gas and dust in this distinctive nebula, captured anew by Hubble in an image as a gift for you to mark its 36th anniversary today. 1/3 https://t.co/5IaRZYNp78

    1.1K20010636K viewsView on X
  • Apr 23, 2026

    Our #HubbleTopImage features supersonic jets from young stars!  The glowing streams of material seen in these Hubble images are signs of star birth. Ejected episodically by young stars, the material tears across space at more than 700,000 kilometres per hour, confined to narrow beams by stellar magnetic fields. 1/2

    9911978625K viewsView on X
  • Oct 15, 2026

    Our #HubbleTopImage features a shot of a strange galaxy! The Coma Galaxy Cluster is one of the closest very rich collections of galaxies in the nearby Universe. The cluster is about 320 million light-years from Earth, and contains more than 1000 members... 1/2 https://t.co/dIGXODvNbA

    93416220719K viewsView on X
  • Oct 2, 2026

    Happy 200,000 orbits to Hubble! 🥳 Hubble completed its 200,000th orbit around Earth on 19 September 2026. On that day, it completed an observation pertaining to one of its scientific legacies: measuring the expansion rate of the Universe. This observation involved the galaxy cluster MACS J0417 (left-centre of this image). 1/2

    946141131025K viewsView on X
  • Aug 27, 2026

    Our #HubbleTopImage features a barred spiral galaxy! NGC 5335 is categorized as a flocculent spiral galaxy, with patchy streamers of star formation across its disk. There is a striking lack of well-defined spiral arms that are commonly found among galaxies. 1/2 https://t.co/c37BuizjbF

    93715313628K viewsView on X
  • Aug 6, 2026

    Our #HubbleTopImage features a star factory! ⭐🏭 This is the star cluster NGC 346, which was captured for Hubble’s 35th anniversary celebrations last year. Although several images of NGC 346 had been released previously, this view was the first to combine Hubble observations made at infrared, optical, and ultraviolet wavelengths into an intricately detailed view of the cluster. 1/2

    9241687532K 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

#hubbletopimage

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 953 interactions against 924K followers, an engagement rate of 0.103%. Measured over 10 original posts, its engagement rate beats 71% of 20,182 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 27K times each, and 3.54% of those impressions turn into an interaction. That is about 2.91% of the follower count, which is the gap between an audience on paper and an audience in a timeline. Posting runs at about 0.67 post a day over the last 30 days, though only 30% of days saw any activity at all. Most posts go out around 12:00 UTC, and Thursday is the busiest day of the week. Of the 10 posts sampled, 100% carry an image or video, 70% are part of a thread and 30% link out. The account's strongest tracked post pulled 4.1K interactions, about 4.3x its own typical post.

What is HUBBLE's engagement rate on X?
HUBBLE (@HUBBLE_space) has an engagement rate of 0.103%, based on the median interactions across 10 original posts from the last 30 days against 924,093 followers. Replies, reposts and quote-posts of other people are excluded from that sample.
Is that a good engagement rate?
At 0.103%, HUBBLE sits above the 25th percentile of the 204,424 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 @HUBBLE_space have real engagement?
Its engagement rate beats 71% of the tracked X accounts closest to it in follower count (20,182 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 @HUBBLE_space post?
Most posts go out around 12:00 UTC, and Thursday is its busiest day, at roughly 0.67 posts per day across the measured window.

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