9yo gelding (at last run, Dec 2009)· Last trainer L Byrne· Last owner L Byrne
by Shahrastani (USA) out of Different Dee (IRE) (Beau Sher)
33 runs · 18 courses · from Apr 2005
As at 27 Oct 2026 · KTB archive: GB, Ireland & France · 2005–present, updated daily
No run recorded since 7 Dec 2009 — 6,168 days ago. Our archive can't say whether the horse is still in training.
Last run Dec 2009Won at DownpatrickLast raced off OR 108
KTB Profile
December Sun (IRE) is 1 from 33. Hasn't won since Dec 2007. The win came on good or faster ground (0 from 19 on softer). Last raced off 108, 9lb below the career-high mark.
Based on 33 archived runs · updated 27 Oct 2026
KTB at a glanceWins on good or fasterOR ↓ 9lb off peak
A/E compares actual wins with what starting prices implied. "Fair" strips the bookmaker margin from the expectation, so favourites and longshots are judged on the same footing — figures near 1.00 mean the market priced this horse about right.
Official rating108↓ 9lb off peak
1086–117
KTB Speed and Rating
KTB Speed
No KTB Speed figures for this horse. The engine scores GB and Irish racing from Oct 2016; runs elsewhere, or earlier, have no figure.
KTB Speed v1 · batch 15 Sep 2026 · GB & Irish racing only · 0 figures from 0 runs · a record, not a forecast
KTB Rating
Best recent KTB Rating103Cthe best of the last 3 rated runs · Kelso, 7 Nov 2009Official rating 108at the last run, 7 Dec 2009
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 →
Jumps 30 figures · best 130A · median 101
Going
Runs
Best
Median
Since 27 Oct 2025
Good
10
117C
95
—
Soft
7
130A
110
—
Heavy
6
104C
95
—
Good to Soft
4
130A
104.5
—
Good to Firm
3
120B
110
—
Distance
Runs
Best
Median
Since 27 Oct 2025
2m1f – 2m4f
16
117C
96
—
1m5f – 2m
14
130A
106.5
—
Of 33 runs looked at, 3 have no figure: did not complete (or a non-runner row) (3).
KTB Rating v1 · batch 3 Oct 2026 · GB & Irish racing only · 30 figures from 33 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.
Run style is derived from in-running commentary, which our data provider does not supply for this horse's races.
Pedigree intelligence
Sire
Shahrastani (USA)
Progeny in our archive have won 5.4% of 392 runs since Jan 2008 (47 horses).
Going
Runs
Wins
SR
vs sire
This horse
Firm
3
1
33.3%
+27.9
—
Good to Firm
67
5
7.5%
+2.1
0 from 3
Good
119
6
5%
−0.4
1 from 11
Good to Soft
58
2
3.4%
−2
0 from 5
Soft
81
4
4.9%
−0.5
0 from 8
Heavy
48
2
4.2%
−1.2
0 from 6
Standard (AW)
16
1
6.3%
+0.9
—
Distance (all codes)
Runs
Wins
SR
vs sire
This horse
1m – 1m1f
3
0
0%
−5.4
—
1m2f – 1m4f
20
2
10%
+4.6
—
1m5f – 2m
154
7
4.5%
−0.9
0 from 15
2m1f – 2m4f
128
5
3.9%
−1.5
1 from 18
2m5f – 3m
66
6
9.1%
+3.7
—
Over 3m
21
1
4.8%
−0.6
—
Flat and jumps together (all codes) · since Jan 2008 · as at 27 Oct 2026 · rows under 30 runs muted · win % is the measure, a record not a forecast
Dam
Different Dee (IRE) (Beau Sher)
6 siblings in the archive, 4 winners — best of them Flemenstar (IRE) (10 wins).
The wins came over 2m–3m1f; the highest grade won is Grade 1 (Flemenstar (IRE)).
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.
December Sun (IRE) won 1 of 33 archived starts between 2005 and 2009, a strike rate of 3%. Placed 4 times in total (12.1% of starts).
Who trained December Sun?
December Sun (IRE) was trained by L Byrne on the most recent run on record, at Musselburgh on 7 December 2009.
Who is December Sun's sire?
December Sun (IRE) is by Shahrastani (USA) out of Different Dee (IRE), whose sire is Beau Sher.
What going does December Sun prefer?
December Sun (IRE) has the best record on good going: 1 win from 11 starts (9.1%). Only going bands with at least three archived starts are read, so this is a direction rather than a settled preference.
What is December Sun's official rating?
The most recent official rating on record is 108, from the run on 7 December 2009. The highest on record is 117.
What is December Sun's sire's record?
Shahrastani (USA)'s progeny in our archive have won 5.4% of 392 runs since Jan 2008 (47 horses), Flat and jumps together.
Who are December Sun's siblings?
Out of Different Dee (IRE), December Sun (IRE) has 6 other produce in our archive, 4 of them winners. Most wins: Flemenstar (IRE) (10). Highest grade won: Grade 1 (Flemenstar (IRE)). The wins came over 2m–3m1f. As at Oct 2026.
December Sun (IRE)·1–33·SR 3%
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