Independent Distant Object SurveyA public search notebook

Rubin / Lasair · field record

lasair_329.5_-9.0

known

Centre RA 329.500°, Dec -9.000°. Approximate footprint half-width 1.5°.

Latest substantive campaign entry

Detections
5,355
Nights
7
Stationary removed
0
Hypotheses
42,080
Injection recovery
4/4 planted objects

Lasair campaign 2026-11-08 18:42 — 23 field(s) · complete.

Recorded log text
- injection test (V ≤ 24.0):
  recovered 4/4 planted objects; 7 candidate(s) in total
- 5355 detections, 0 stationary removed, 7 nights; 3019 anchors × hypotheses = 42080; survivors per stage [1569, 17]; 97.4s
  #1  [moderate] r= 46.26±0.500 AU  a= 57.47 e=0.479 i= 3.43°  5 obs / 5 nights / 15 d  rms 0.05"  H=6.23, D≈151–377 km  [unknown]
  #2  [weak] r= 29.46±0.373 AU  a= 46.90 e=0.630 i=16.63°  4 obs / 4 nights / 15 d  rms 0.05"  H=8.17, D≈62–154 km  [matches 2025 MK402]
  #3  [weak] r= 39.65±0.919 AU  a= 42.56 e=0.315 i=28.98°  4 obs / 4 nights / 15 d  rms 0.06"  H=7.13, D≈99–249 km  [matches 2025 MH396]
- non-detection check:
  #1 r=46.3 AU 5 obs / 5 nights: missed on 0 covered night(s) of 2 unmatched
  #2 r=29.5 AU 4 obs / 4 nights: missed on 0 covered night(s) of 3 unmatched
  #3 r=39.6 AU 4 obs / 4 nights: missed on 0 covered night(s) of 3 unmatched
- 208 s

On-disk search report

This report may describe a different rerun from the campaign log. Statistics are shown separately; curated findings supply reviewed identifications.

Detections
5,355
Nights
7
Exposures
54
Stationary removed
0
Hypotheses
42,080
Search seconds
97

Report candidates and identifications

Candidate #1 moderate

Known: 2025 OO737 (poorly determined orbit)

Distance r
46.26 AU
Observations / nights
5 / 5
Dates
2026-06-26 – 2026-07-11 (MJD 61,217.0–61,232.0)
Arc
14.9 days
Radial rms
0.05″
Orbit fit
a = 57.47 AU; e = 0.479; i = 3.43°
Absolute magnitude H
6.23
Diameter estimate
151–377 km (albedo 0.25–0.04)

Reviewed identification: 2025 OO737: a known object two arcminutes from its prediction.

lasair_329.5_-9.0, candidate #1: difference-image cutouts
lasair_329.5_-9.0, candidate #1: difference-image cutouts · Rubin Observatory / LSST

Candidate #2 weak

Known: 2025 MK402

Distance r
29.46 AU
Observations / nights
4 / 4
Dates
2026-06-26 – 2026-07-11 (MJD 61,217.4–61,232.4)
Arc
14.9 days
Radial rms
0.05″
Orbit fit
a = 46.90 AU; e = 0.630; i = 16.63°
Absolute magnitude H
8.17
Diameter estimate
62–154 km (albedo 0.25–0.04)

Candidate #3 weak

Known: 2025 MH396

Distance r
39.65 AU
Observations / nights
4 / 4
Dates
2026-06-26 – 2026-07-11 (MJD 61,217.4–61,232.3)
Arc
14.9 days
Radial rms
0.06″
Orbit fit
a = 42.56 AU; e = 0.315; i = 28.98°
Absolute magnitude H
7.13
Diameter estimate
99–249 km (albedo 0.25–0.04)

Campaign history