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Horse profile

Artemis Star (GB)

2yo colt · Trainer William Muir & Chris Grassick · Owner Muir Racing Partnership Goodwood
by Ardad (IRE) out of Astronomy Domine (GB) (Galileo)
4 runs · 4 courses · from Jul 2026
As at 18 Oct 2026 · KTB archive: GB, Ireland & France · 2005–present, updated daily
Ran 14 days ago · 7th of 15 Last raced off OR 75
KTB Profile

Artemis Star is a maiden who has run four times without winning and placed once. His best effort came when second of eight at Epsom in Aug 2026. The colt by Ardad out of an Astronomy Domine mare led when finishing seventh of 15 in the £200,000 Tattersalls October Auction Stakes at Newmarket in Oct 2026. He raced off an official rating of 75 at that Class 2 event.

Based on 4 archived runs · run-style from 2 commented runs · updated 18 Oct 2026

KTB Speed and Rating

KTB Speed

Best recent Speed 90 the best of the last 3 graded (A or B) runs · Epsom, 31 Aug 2026

How fast the horse ran, as points against the day-corrected standard time for its course and distance: 100 is the median GB Class 4 handicap winner on that code; one point is 0.1% of the standard time. A, B or C is how much the day's card could tell us, not how good the run was. What this means →

Flat 4 figures · best 90A · median 81.5
GoingRunsBestMedianSince 18 Oct 2025
Good to Firm275C74.52 · 75 / 74.5
Good to Soft1——1 · —
Good1——1 · —
DistanceRunsBestMedianSince 18 Oct 2025
6f – 7f490A81.54 · 90 / 81.5

KTB Speed v1 · batch 15 Sep 2026 · GB & Irish racing only · 4 figures from 4 runs · as at 11 Oct 2026 · a record, not a forecast

KTB Rating

Best recent KTB Rating 88A the best of the last 3 rated runs · Ffos Las, 4 Aug 2026 Official rating 75 at the last run, 3 Oct 2026

What the horse achieved in each race, in pounds on the official-rating scale, from the weight carried, the lengths beaten and the race's own level solved across the archive — never the market, never the official rating as a starting point. The headline is the best of the horse's last three rated runs on that code. A, B or C on a run is how much known form was in that race. What this means →

Flat 4 figures · best 88A · median 77
GoingRunsBestMedianSince 18 Oct 2025
Good to Firm277A762 · 77 / 76
Good to Soft1——1 · —
Good1——1 · —
DistanceRunsBestMedianSince 18 Oct 2025
6f – 7f488A774 · 88 / 77

KTB Rating v1 · batch 3 Oct 2026 · GB & Irish racing only · 4 figures from 4 runs · as at 4 Oct 2026 · a record, not a forecast

Both figures are KTB's own, computed from the archive; no vendor rating enters either. Every run's figure is on its form line below with its grade. Grades measure how much the archive could see, never the merit of the run.

Pedigree intelligence

Sire

Progeny in our archive have won 8.7% of 3,499 runs since Jan 2008 (350 horses).

GoingRunsWinsSRvs sireThis horse
Firm4037.5%−1.2—
Good to Firm697689.8%+1.10 from 2
Good800627.8%−0.90 from 1
Good to Soft3553911%+2.30 from 1
Soft324319.6%+0.9—
Heavy9355.4%−3.3—
Standard (AW)1,190988.2%−0.5—
Distance (all codes)RunsWinsSRvs sireThis horse
Under 6f1,14012611.1%+2.4—
6f – 7f1,9531547.9%−0.80 from 4
1m – 1m1f327206.1%−2.6—
1m2f – 1m4f5559.1%+0.4—
1m5f – 2m700%−8.7—
2m1f – 2m4f1715.9%−2.8—

Flat and jumps together (all codes) · since Jan 2008 · as at 17 Oct 2026 · rows under 30 runs muted · win % is the measure, a record not a forecast

Dam

5 siblings in the archive, 2 winners — best of them Mercian Hymn (GB) (2 wins).

The wins came over 7f–1m4f; the highest grade won is Class 2 (Astronomy's Choice (GB)).

ProduceRunsWinsWin tripsBest grade
Mercian Hymn (GB)1421m4fClass 5
Astronomy's Choice (GB)517fClass 2
Lordofthehorizon (FR)40——
Will of Iron (GB)30——
Pink Ticket (GB)60——

Record by conditions

GoingRunsWinsSR£1
Good to Firm 2 0 0% −2.00
Good to Soft 1 0 0% −1.00
Good 1 0 0% −1.00

ClassRunsWinsSR£1
Class 3 2 0 0% −2.00
Class 2 1 0 0% −1.00
Class 4 1 0 0% −1.00

CourseRunsWinsSR£1
Newmarket 1 0 0% −1.00
Epsom 1 0 0% −1.00
Ffos Las 1 0 0% −1.00
Windsor 1 0 0% −1.00

JockeyRunsWinsSR£1
Lewis Edmunds 2 0 0% −2.00
Marco Ghiani 1 0 0% −1.00
Robert Havlin 1 0 0% −1.00

Splits include every sample, however small — muted rows are under 3 runs. A one-from-one record is a fact, not a trend: read the Runs column before the strike rate.

Form

DateCourseRace PosBtn Wgt ORSpdKTB Jockey SP
03 Oct 26+33d Newmarket £200,000 Tattersalls October Auction Stakes (GBB Race) Class 2 · 7f · Good To Firm · 15 ran Made the running - overtaken before halfway - stayed prominent - urged over 2f out - faded 1f out - finished 7th 7/15 1½ 8-9 7575C77A Marco Ghiani 33/1
31 Aug 26+27d Epsom Irish Ebf Restricted Maiden Stakes (for Horses In Bands C And D) (Ebf Restricted Race Qualifier) (GBB Race) Class 3 · 7f · Good To Soft · 8 ran Went straight to front - pressed for effort and lost the advantage over 2f out - kept on into second but never able to reel in the winner 2/8 ¾ 9-4 —90A77A Robert Havlin 13/8
04 Aug 26+22d Ffos Las Ebf Novice Stakes (gbb Race) Class 3 · 7.5f · Good · 7 ran Set the gallop in front early - driven out with two furlongs left before losing top spot inside the final furlong - stayed on without extra finishing third 3/7 1 9-4 —88A88A Lewis Edmunds 22/1
13 Jul 26 Windsor Ambrose Loves Reggae EBF Novice Stakes (Div I) (GBB Race) Class 4 · 6f · Good To Firm · 12 ran settled towards the back of the field - moved left over 2f out - made progress over 1f out - stayed on inside final furlong without threatening 5/12 hd 9-7 —74A75A Lewis Edmunds 40/1

Quick answers

How many races has Artemis Star (GB) won?
Artemis Star (GB) has yet to win, from 4 archived starts in 2026. Placed 1 time in total (25% of starts).
Who trains Artemis Star (GB)?
Artemis Star (GB) is trained by William Muir & Chris Grassick, who saddled the horse on its most recent run on 3 October 2026.
Who is Artemis Star (GB)'s sire?
Artemis Star (GB) is by Ardad (IRE) out of Astronomy Domine (GB), whose sire is Galileo.
What is Artemis Star (GB)'s official rating?
The most recent official rating on record is 75, from the run on 3 October 2026. That is also the highest on record.
What is Artemis Star (GB)'s sire's record?
Ardad (IRE)'s progeny in our archive have won 8.7% of 3,499 runs since Jan 2008 (350 horses), Flat and jumps together.
Who are Artemis Star (GB)'s siblings?
Out of Astronomy Domine (GB), Artemis Star (GB) has 5 other produce in our archive, 2 of them winners. Most wins: Mercian Hymn (GB) (2). Highest grade won: Class 2 (Astronomy's Choice (GB)). The wins came over 7f–1m4f. As at Oct 2026.

Record shown from July 2026. Our archive holds racing in Great Britain, Ireland and France from January 2005. Runs in other countries are not in it, and earlier runs are not available from our data provider. In-running comments are available from 2024 onward.