Chandra Observatory engagement report
@chandraxray - 418K followers on X
Measured over 2 original posts from a 30-day window, last computed on August 30, 2026.
Engagement
Early reading. We have captured 2 original posts for this account, below the 8 we require before treating a median as settled. The numbers above describe what we have seen so far, not a finished profile of the account.
A typical post picks up 784 interactions against 418K followers, an engagement rate of 0.187%. Posts are seen about 38K times each, and 2.06% of those impressions turn into an interaction. That is about 9.08% of the follower count, which is the gap between an audience on paper and an audience in a timeline. Posting runs at about 0.1 posts a day over the last 30 days, though only 10% of days saw any activity at all. Most posts go out around 15:00 UTC, and Tuesday is the busiest day of the week. Of the 2 posts sampled, 100% carry an image or video. The account's strongest tracked post pulled 20K interactions, about 26x its own typical post. Only 2 original posts have been captured so far, fewer than the 8 posts we want behind a median before treating it as settled. Read the figures above as an early measurement of this account, not as a finished profile of it.
Measured over 2 original posts from a 30-day window, last computed on August 30, 2026.
Where this sits in the catalog
At 0.187%, Chandra Observatory sits above the 50th percentile of the 36,378 accounts in this comparison. That places it in the above the median band, which runs 0.08% to 0.432%.
Show the percentile table
| Percentile | Engagement rate |
|---|---|
| 10th percentile | 0.002% |
| 25th percentile | 0.012% |
| 50th percentile | 0.08% |
| 75th percentile | 0.432% |
| 90th percentile | 2.10% |
| 99th percentile | 161.0% |
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 15:00 UTC, and Tuesday 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% | 50K |
| 01:00 UTC | -2% | 51K |
| 02:00 UTC | -3% | 50K |
| 03:00 UTC | -4% | 53K |
| 04:00 UTC | -6% | 43K |
| 05:00 UTC | -4% | 42K |
| 06:00 UTC | -4% | 48K |
| 07:00 UTC | -5% | 52K |
| 08:00 UTC | -4% | 60K |
| 09:00 UTC | -3% | 69K |
| 10:00 UTC | -2% | 72K |
| 11:00 UTC | -3% | 78K |
| 12:00 UTC | -2% | 86K |
| 13:00 UTC | -2% | 94K |
| 14:00 UTC | -4% | 97K |
| 15:00 UTC | -2% | 100K |
| 16:00 UTC | -3% | 97K |
| 17:00 UTC | -2% | 90K |
| 18:00 UTC | -1% | 84K |
| 19:00 UTC | -2% | 79K |
| 20:00 UTC | -1% | 74K |
| 21:00 UTC | -1% | 66K |
| 22:00 UTC | -2% | 57K |
| 23:00 UTC | -2% | 51K |
Show engagement by day of week as a table
| Day | Vs author median | Posts |
|---|---|---|
| Sunday | +4% | 230K |
| Monday | 0% | 286K |
| Tuesday | -2% | 276K |
| Wednesday | -1% | 251K |
| Thursday | -1% | 244K |
| Friday | -3% | 252K |
| Saturday | +3% | 227K |
Best tweets
- Jun 23, 202626x their median
Sparkly, swirly, and surprising 🌌 @ChandraXray data shows that this galaxy, Messier 83, is unusual. Over 20 of its supernova remnants – remains from star explosions – vary drastically in X-ray brightness. Typically, the remnants' brightness would fade slowly over time. https://t.co/M8bOJNPj93
- Feb 25, 20263.4x their median
Peaking on February 28th in the Northern Hemisphere, six planets will all be visible from clear & dark night skies. In celebration of this planetary group project, Chandra is releasing three new planetary sonifications. Experience the data-driven sounds of Uranus: https://t.co/1uzY3Eg6Jn
- Apr 30, 20263.4x their median
This striking new view of the Pinwheel Galaxy combines X-ray light from Chandra with other types of light from ground-based observations, @NASAHubble, and XMM-Newton. The galaxy is roughly 170,000 light-years across, making it about 70% larger than our own Milky Way Galaxy.🌀 https://t.co/HbpDwOGVtU
- May 15, 20263.1x their median
Westerlund 2 is a young cluster of thousands of stars located about 20,000 light-years from Earth. This close-up image, roughly 12 light-years across, combines observations from NASA's Chandra X-ray Observatory & @NASAWebb.✨ https://t.co/9p96D0f1Zj
- Mar 19, 20262.7x their median
Spring into spring with this new image of the Cat's Paw Nebula from NASA's Chandra and @NASAWebb. We expect it to start knocking planets off the counter for sport any minute now. 🐾 https://t.co/Pl06XurGrK
- Dec 22, 20252.5x their median
We're sending you a holiday card with 4 new winter-themed images from Chandra with data from other telescopes, including our friends at @NASAHubble & @NASAWebb. Each object in the collection gives a wink to wintertime cheer, either in its name or shape.🌲 https://t.co/im6HurCDwX https://t.co/6pkrL45fzO
- Jun 30, 20262.5x their median
In celebration of the 250th birthday of the United States, @NASA has unveiled four cosmic images from its Chandra X-ray Observatory rendered in red, white, and blue that represent the wonders of the universe the agency explores. 🎆More: https://t.co/ucRectEWwK https://t.co/WL3Gkf3u4P
- Jan 6, 20262.2x their median
This new video shows changes in Kepler's Supernova Remnant using data from @NASA's Chandra captured over more than two and a half decades. Located about 17,000 light-years from Earth, parts of the remnant are still traveling at ~13.8 million mph. https://t.co/Iwl7n8w0Of #AAS247 https://t.co/T2SjIy2nlh
- May 14, 20262.0x their median
At the heart of galaxy NGC 1365, a supermassive black hole is basically feasting at an all‑you‑can‑eat buffet in this image from Chandra and @NASAWebb. Located about 60 million light-years from Earth, this gobbling black hole has a mass of roughly 2 million suns... and growing.⚫ https://t.co/0pbq1DhUGP
- Jun 1, 20261.8x their median
Some of our galaxy’s youngest, hottest, and most massive stars blaze to life in the nearby Carina Nebula. Winds from these powerful stars can carve out bubbles of hot gas, producing dramatic shapes in the surrounding clouds of colder gas and dust.✨ https://t.co/phgWzwxeKR
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.
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Reading these numbers
A typical post picks up 784 interactions against 418K followers, an engagement rate of 0.187%. Posts are seen about 38K times each, and 2.06% of those impressions turn into an interaction. That is about 9.08% of the follower count, which is the gap between an audience on paper and an audience in a timeline. Posting runs at about 0.1 posts a day over the last 30 days, though only 10% of days saw any activity at all. Most posts go out around 15:00 UTC, and Tuesday is the busiest day of the week. Of the 2 posts sampled, 100% carry an image or video. The account's strongest tracked post pulled 20K interactions, about 26x its own typical post. Only 2 original posts have been captured so far, fewer than the 8 posts we want behind a median before treating it as settled. Read the figures above as an early measurement of this account, not as a finished profile of it.
- What is Chandra Observatory's engagement rate on X?
- Chandra Observatory (@chandraxray) has an engagement rate of 0.187%, based on the median interactions across 2 original posts from the last 30 days against 418,397 followers. Replies, reposts and quote-posts of other people are excluded from that sample.
- Is that a good engagement rate?
- At 0.187%, Chandra Observatory sits above the 50th percentile of the 36,378 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 @chandraxray have real engagement?
- There is not yet enough sample to rank this account against others of its size.
- When does @chandraxray post?
- Most posts go out around 15:00 UTC, and Tuesday is its busiest day, at roughly 0.1 posts per day across the measured window.