Independent Distant Object SurveyA public search notebook

archival DECam · campaign log

Campaign 2026-11-08 06:12 — 10 field(s)

Source: campaign.md. This preserves the run as logged, including incomplete entries and historical match labels.

cell4505: RA 15.074, Dec -0.001, MJD 57613–57645, 23 nights

complete log entry · Field history and current report

Detections
19,201
Nights
23
Injection recovery
3/4 planted objects
Campaign record (historical text)
- 110 exposures, median depth95 21.34 → magnitude cut 20.9
- sweep: 19201 single-night objects over 23 nights written to data/sweeps/cell4505/detections.parquet
- known distant objects in the data: 3
  - (612581) 2003 QX111                      23              1       8.0"   7.0  [observation IDs omitted]
  - 2014 UE241                               23              1      28.9"   6.5  [observation IDs omitted]
  - 2014 UB277                               23              1       8.4"   7.9  [observation IDs omitted]
- hypotheses: 1172
- injection test:
  planted #0 mag 20.1 on 23 nights: RECOVERED 23/23 (spurious 0, r=66.1 AU)
    planted #1 mag 19.8 on 20 nights: RECOVERED 20/20 (spurious 0, r=39.3 AU)
    planted #2 mag 19.8 on 20 nights: RECOVERED 20/20 (spurious 0, r=32.7 AU)
    planted #3 mag 20.0 on 17 nights: missed 0/17 
  recovered 3/4 planted objects; 3 candidate(s) in total
- real search:
  no candidates

cell6761: RA 161.943, Dec 0.007, MJD 58070–58102, 22 nights

complete log entry · Field history and current report

Detections
34,107
Nights
22
Injection recovery
4/4 planted objects
Campaign record (historical text)
- 130 exposures, median depth95 21.09 → magnitude cut 20.7
- sweep: 34107 single-night objects over 22 nights written to data/sweeps/cell6761/detections.parquet
- known distant objects in the data: 7
  - 2019 GP186                               22              5      13.6"   7.8  [observation IDs omitted]
  - 2019 EO10                                22              3      20.4"   7.3  [observation IDs omitted]
  - 2019 GS188                               22              3      16.9"   7.5  [observation IDs omitted]
  - 2019 AN142                               22              1      20.8"   8.2  [observation IDs omitted]
  - 2019 GN186                               22              1      25.1"   8.0  [observation IDs omitted]
- hypotheses: 22365
- injection test:
  planted #0 mag 19.9 on 22 nights: RECOVERED 22/22 (spurious 0, r=65.5 AU)
    planted #1 mag 18.8 on 20 nights: RECOVERED 20/20 (spurious 0, r=54.9 AU)
    planted #2 mag 20.3 on 21 nights: RECOVERED 21/21 (spurious 0, r=50.4 AU)
    planted #3 mag 20.4 on 18 nights: RECOVERED 18/18 (spurious 0, r=38.9 AU)
  recovered 4/4 planted objects; 6 candidate(s) in total
- real search:
  no candidates

cell6566: RA 186.75, Dec 0.001, MJD 57063–57095, 19 nights

complete log entry · Field history and current report

Detections
9,153
Nights
19
Injection recovery
3/4 planted objects
Campaign record (historical text)
- 120 exposures, median depth95 22.30 → magnitude cut 21.9
- sweep: 9153 single-night objects over 19 nights written to data/sweeps/cell6566/detections.parquet
- known distant objects in the data: 3
  - 2017 CJ55                                19              2      15.7"   9.1  [observation IDs omitted]
  - 2003 FD128                               14              2      17.2"   7.8  [observation IDs omitted]
  - (127871) 2003 FC128                      19              1      20.4"   7.5  [observation IDs omitted]
- hypotheses: 7126
- injection test:
  planted #0 mag 21.1 on 19 nights: RECOVERED 19/19 (spurious 0, r=66.4 AU)
    planted #1 mag 20.2 on 18 nights: RECOVERED 18/18 (spurious 0, r=55.7 AU)
    planted #2 mag 20.4 on 18 nights: missed 0/18 
    planted #3 mag 20.8 on 16 nights: RECOVERED 16/16 (spurious 0, r=57.8 AU)
  recovered 3/4 planted objects; 3 candidate(s) in total
- real search:
  no candidates

cell4710: RA 344.973, Dec -0.008, MJD 56638–56670, 18 nights

complete log entry · Field history and current report

Detections
11,459
Nights
18
Injection recovery
3/4 planted objects

Candidate #1 weak

Unidentified candidate — unvetted; not a discovery

Distance r
36.12 AU
Observations / nights
4 / 4
Dates
Dates not recorded
Arc
15.0 days
Radial rms
0.12″
Orbit fit
a = -49,721.87 AU; e = 1.000; i = 29.23°
Campaign record (historical text)
- 91 exposures, median depth95 22.97 → magnitude cut 22.5
- sweep: 11459 single-night objects over 18 nights written to data/sweeps/cell4710/detections.parquet
- known distant objects in the data: 1
  - (666449) 2010 JJ210                      18              1       8.0"   7.0  [observation IDs omitted]
- hypotheses: 11167
- injection test:
  planted #0 mag 21.7 on 18 nights: RECOVERED 18/18 (spurious 0, r=66.0 AU)
    planted #1 mag 21.7 on 17 nights: missed 0/17 
    planted #2 mag 22.1 on 17 nights: RECOVERED 17/17 (spurious 0, r=61.2 AU)
    planted #3 mag 21.9 on 15 nights: RECOVERED 15/15 (spurious 0, r=39.3 AU)
  recovered 3/4 planted objects; 4 candidate(s) in total
- real search:
  #1  [weak] r= 36.12±0.088 AU  a=-49721.87 e=1.000 i=29.23°  4 obs / 4 nights / 15 d  rms 0.12"  H=4.89, D≈280–700 km  DWARF-PLANET-SIZED?  [unknown]
- follow-up check:
  #1 r=36.1 AU, 4 nights / 15 d, rms 0.12": 20 other covered night(s), 3 with a detection near the prediction
        night 56575: no single-night object within radius
        night 56576: no single-night object within radius
        night 56577: no single-night object within radius
        night 56578: no single-night object within radius
        night 56593: nearest 26.6"
        night 56604: no single-night object within radius
        night 56605: no single-night object within radius
        night 56610: no single-night object within radius
        night 56614: no single-night object within radius
        night 56615: no single-night object within radius
        night 56617: no single-night object within radius
        night 56618: no single-night object within radius
        night 56619: no single-night object within radius
        night 56639: nearest 25.0"
        night 56656: no single-night object within radius
        night 56657: nearest 26.9"
        night 56658: no single-night object within radius
        night 56659: no single-night object within radius
        night 56660: no single-night object within radius
        night 56661: no single-night object within radius
  note: without perturbations or a precise ephemeris, predictions degrade with distance from the arc; treat hits far from the arc as tentative and misses near it as strong evidence against.

cell4351: RA 359.99, Dec -0.195, MJD 58110–58142, 17 nights

complete log entry · Field history and current report

Detections
19,924
Nights
17
Injection recovery
3/4 planted objects
Campaign record (historical text)
- 85 exposures, median depth95 20.60 → magnitude cut 20.2
- sweep: 19924 single-night objects over 17 nights written to data/sweeps/cell4351/detections.parquet
- known distant objects in the data: 0
- hypotheses: 160612
- injection test:
  planted #0 mag 19.4 on 17 nights: RECOVERED 16/17 (spurious 0, r=66.1 AU)
    planted #1 mag 18.9 on 16 nights: missed 0/16 
    planted #2 mag 18.3 on 16 nights: RECOVERED 16/16 (spurious 0, r=49.8 AU)
    planted #3 mag 18.8 on 16 nights: RECOVERED 16/16 (spurious 0, r=73.5 AU)
  recovered 3/4 planted objects; 3 candidate(s) in total
- real search:
  no candidates

cell4864: RA 0.007, Dec 0.166, MJD 56941–56973, 15 nights

complete log entry · Field history and current report

Detections
22,098
Nights
15
Injection recovery
3/4 planted objects
Campaign record (historical text)
- 88 exposures, median depth95 21.39 → magnitude cut 21.0
- sweep: 22098 single-night objects over 19 nights written to data/sweeps/cell4864/detections.parquet
- known distant objects in the data: 4
  - 2013 RW157                               19              1      29.1"   24.0  [observation IDs omitted]
  - 2013 TX187                               19              1      23.2"   23.5  [observation IDs omitted]
  - 2013 RV155                               12              1       2.3"   23.2  [observation IDs omitted]
  - 2013 RO124                                1              1      10.9"   23.5  [observation IDs omitted]
- hypotheses: 860
- injection test:
  planted #0 mag 20.2 on 19 nights: RECOVERED 17/19 (spurious 0, r=66.4 AU)
    planted #1 mag 19.3 on 18 nights: RECOVERED 16/18 (spurious 0, r=56.2 AU)
    planted #2 mag 19.5 on 18 nights: missed 0/18 
    planted #3 mag 19.9 on 16 nights: RECOVERED 14/16 (spurious 0, r=58.2 AU)
  recovered 3/4 planted objects; 3 candidate(s) in total
- real search:
  no candidates

cell4522: RA 0.248, Dec -0.031, MJD 58036–58068, 15 nights

complete log entry · Field history and current report

Detections
18,556
Nights
15
Injection recovery
2/4 planted objects
Campaign record (historical text)
- 70 exposures, median depth95 21.07 → magnitude cut 20.7
- sweep: 18556 single-night objects over 16 nights written to data/sweeps/cell4522/detections.parquet
- known distant objects in the data: 0
- hypotheses: 18056
- injection test:
  planted #0 mag 19.9 on 16 nights: RECOVERED 15/16 (spurious 0, r=66.7 AU)
    planted #1 mag 18.9 on 13 nights: missed 0/13 
    planted #2 mag 19.4 on 15 nights: RECOVERED 15/15 (spurious 0, r=50.6 AU)
    planted #3 mag 19.2 on 15 nights: missed 0/15 
  recovered 2/4 planted objects; 2 candidate(s) in total
- real search:
  no candidates

cell6850: RA 156.58, Dec 2.179, MJD 57069–57101, 11 nights

complete log entry · Field history and current report

Detections
5,841
Nights
11
Injection recovery
4/4 planted objects
Campaign record (historical text)
- 31 exposures, median depth95 23.60 → magnitude cut 22.5
- sweep: 5841 single-night objects over 12 nights written to data/sweeps/cell6850/detections.parquet
- known distant objects in the data: 0
- hypotheses: 268
- injection test:
  planted #0 mag 21.7 on 12 nights: RECOVERED 12/12 (spurious 0, r=67.2 AU)
    planted #1 mag 21.2 on 9 nights: RECOVERED 9/9 (spurious 0, r=70.7 AU)
    planted #2 mag 21.0 on 10 nights: RECOVERED 10/10 (spurious 0, r=54.2 AU)
    planted #3 mag 21.5 on 11 nights: RECOVERED 11/11 (spurious 0, r=50.8 AU)
  recovered 4/4 planted objects; 4 candidate(s) in total
- real search:
  no candidates

cell10710: RA 255.122, Dec -30.006, MJD 58226–58258, 10 nights

skipped · Field history and current report

Detections
38,791
Nights
10
Campaign record (historical text)
- 97 exposures, median depth95 20.55 → magnitude cut 20.2
- sweep: 38791 single-night objects over 10 nights written to data/sweeps/cell10710/detections.parquet
- known distant objects in the data: 0
- hypotheses: 1062555
- too large for this campaign; skipped

cell6849: RA 159.059, Dec 2.078, MJD 57069–57101, 10 nights

complete log entry · Field history and current report

Detections
7,787
Nights
10
Injection recovery
4/4 planted objects
Campaign record (historical text)
- 33 exposures, median depth95 23.59 → magnitude cut 22.5
- sweep: 7787 single-night objects over 10 nights written to data/sweeps/cell6849/detections.parquet
- known distant objects in the data: 1
  - 2015 DR370                               10              1      26.9"   23.1  [observation IDs omitted]
- hypotheses: 502
- injection test:
  planted #0 mag 21.7 on 10 nights: RECOVERED 10/10 (spurious 0, r=67.2 AU)
    planted #1 mag 21.7 on 8 nights: RECOVERED 8/8 (spurious 0, r=73.7 AU)
    planted #2 mag 21.3 on 10 nights: RECOVERED 10/10 (spurious 0, r=38.3 AU)
    planted #3 mag 21.2 on 10 nights: RECOVERED 10/10 (spurious 0, r=73.0 AU)
  recovered 4/4 planted objects; 4 candidate(s) in total
- real search:
  no candidates