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
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%.
Show the percentile table
| Percentile | Engagement rate |
|---|---|
| 10th percentile | 0.004% |
| 25th percentile | 0.024% |
| 50th percentile | 0.143% |
| 75th percentile | 0.677% |
| 90th percentile | 2.55% |
| 99th percentile | 82.4% |
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.
Show engagement by hour posted, utc as a table
| Hour (UTC) | Vs author median | Posts |
|---|---|---|
| 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 UTC | 0% | 116K |
| 22:00 UTC | -2% | 100K |
| 23:00 UTC | -1% | 90K |
Show engagement by day of week as a table
| Day | Vs author median | Posts |
|---|---|---|
| Sunday | +5% | 393K |
| Monday | +1% | 483K |
| Tuesday | -2% | 520K |
| Wednesday | -3% | 472K |
| Thursday | -2% | 430K |
| Friday | -3% | 447K |
| Saturday | +2% | 393K |
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.
| Format | This account | Catalog effect | 95% interval | Accounts behind it |
|---|---|---|---|---|
| Image or video | 100% of posts | +111% | +108% to +115% | 34K |
| Outbound link | 30% 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
- 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
- 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
- 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
- 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
- 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
- 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
- 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
- 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
- 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
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
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.