C/2023 T3 (Fuls)
Metadata
| Parameter | Value |
|---|---|
| Designation | C/2023 T3 (Fuls) |
| Type | C |
| Perihelion (tp_cal, UTC) | 2025-01-25T08:17:25.160640Z |
| Orbit solution date (soln_date, UTC) | 2026-03-07T14:42:54Z |
| Obs used | 1357 |
| NEO | - |
| M1 | 10.000 |
| K1 | 7.250 |
| PC | 0.030 |
| Discovery observation (MPC, UTC) | 2023-10-15T11:19:47.798400Z |
| Discovery magnitude (MPC) | 18.55 G |
| Discovery observatory (MPC) | G96 · University of Arizona Mt. Lemmon Survey |
Osculating Elements
| Parameter | Value |
|---|---|
| Epoch (epoch_cal, TDB) | 2024-11-05.0000000 |
| e | 0.99538546 |
| q (au) | 3.548295 |
| a (au) | 768.937709 |
| i (deg) | 27.222046 |
| Ω (om, deg) | 246.000521 |
| ω (w, deg) | 302.847384 |
| M (ma, deg) | 359.996240 |
Magnitude
Scatter + Global Linear
$$ M_a = (8.892 + 3.343\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
Model Parameters
| Parameter | Value |
|---|---|
| H0 | 8.892 |
| n | 3.343 |
| gf | 0.866 |
| gb | -1.000 |
| k | 1.000 |
| δ90 | 1.000 |
| Parameter | Symbol | Range | Description |
|---|---|---|---|
| Absolute magnitude at 1 AU from Sun and Earth | H0 | -5 to 20 | Intrinsic brightness of the comet |
| Photometric slope parameter | n | 2 to 6 | Rate of brightness change with heliocentric distance |
| Forward scattering asymmetry factor | gf |
0.8 to 1 | Degree of forward scattering |
| Backward scattering asymmetry factor | gb |
-1 to -0.5 | Degree of backward scattering |
| Partitioning coefficient | k | 0.8 to 1 | Ratio between forward/backward scattering contributions |
| Dust-to-gas brightness ratio | δ90 | 1 to 10 | Relative contribution of dust scattering to gas emission |
Reference: EPSC-DPS2025-160
Residuals (Piecewise)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| Start (UTC) | End (UTC) | a | b |
|---|---|---|---|
| 2023-09-09 | 2024-02-27 | +9.4988 | -6.539 |
| 2024-02-27 | 2025-01-24 | -2.9289 | +1.616 |
| 2025-01-26 | 2025-08-19 | -8.2903 | +4.704 |
| 2025-08-19 | 2026-02-25 | +8.8989 | -5.908 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Finding Chart
Ephemeris
| Date/Time (UTC) | RA (J2000) | Dec (J2000) | Nearest HIP | Dist from HIP (arcmin) |
|---|---|---|---|---|
| 2026-06-01 00:00 | 17:33:14.42 | -14:03:44.0 | HIP 85939 | 34.61 |
| 2026-06-01 12:00 | 17:33:00.26 | -14:02:02.8 | HIP 85871 | 33.20 |
| 2026-06-02 00:00 | 17:32:46.06 | -14:00:22.0 | HIP 85871 | 31.46 |
| 2026-06-02 12:00 | 17:32:31.83 | -13:58:41.8 | HIP 85871 | 30.12 |
| 2026-06-03 00:00 | 17:32:17.57 | -13:57:02.0 | HIP 85871 | 29.24 |
| 2026-06-03 12:00 | 17:32:03.27 | -13:55:22.7 | HIP 85871 | 28.86 |
| 2026-06-04 00:00 | 17:31:48.95 | -13:53:44.0 | HIP 85871 | 28.99 |
| 2026-06-04 12:00 | 17:31:34.60 | -13:52:05.7 | HIP 85871 | 29.64 |
| 2026-06-05 00:00 | 17:31:20.22 | -13:50:28.0 | HIP 85871 | 30.78 |
| 2026-06-05 12:00 | 17:31:05.83 | -13:48:50.7 | HIP 85691 | 28.54 |
| 2026-06-06 00:00 | 17:30:51.41 | -13:47:14.0 | HIP 85691 | 26.48 |
| 2026-06-06 12:00 | 17:30:36.98 | -13:45:37.8 | HIP 85691 | 24.85 |
| 2026-06-07 00:00 | 17:30:22.53 | -13:44:02.2 | HIP 85691 | 23.75 |
| 2026-06-07 12:00 | 17:30:08.07 | -13:42:27.1 | HIP 85691 | 23.26 |
| 2026-06-08 00:00 | 17:29:53.60 | -13:40:52.5 | HIP 85691 | 23.41 |
| 2026-06-08 12:00 | 17:29:39.13 | -13:39:18.5 | HIP 85691 | 24.19 |
| 2026-06-09 00:00 | 17:29:24.65 | -13:37:45.1 | HIP 85691 | 25.54 |
| 2026-06-09 12:00 | 17:29:10.16 | -13:36:12.2 | HIP 85691 | 27.38 |
| 2026-06-10 00:00 | 17:28:55.68 | -13:34:39.9 | HIP 85410 | 29.22 |
| 2026-06-10 12:00 | 17:28:41.20 | -13:33:08.2 | HIP 85410 | 25.43 |
| 2026-06-11 00:00 | 17:28:26.73 | -13:31:37.0 | HIP 85410 | 21.65 |
| 2026-06-11 12:00 | 17:28:12.26 | -13:30:06.5 | HIP 85410 | 17.90 |
| 2026-06-12 00:00 | 17:27:57.80 | -13:28:36.5 | HIP 85410 | 14.19 |
| 2026-06-12 12:00 | 17:27:43.36 | -13:27:07.1 | HIP 85410 | 10.59 |
| 2026-06-13 00:00 | 17:27:28.93 | -13:25:38.4 | HIP 85410 | 7.21 |
| 2026-06-13 12:00 | 17:27:14.52 | -13:24:10.2 | HIP 85410 | 4.58 |
| 2026-06-14 00:00 | 17:27:00.13 | -13:22:42.7 | HIP 85410 | 4.35 |
| 2026-06-14 12:00 | 17:26:45.76 | -13:21:15.8 | HIP 85410 | 6.75 |
| 2026-06-15 00:00 | 17:26:31.42 | -13:19:49.5 | HIP 85410 | 10.03 |
| 2026-06-15 12:00 | 17:26:17.11 | -13:18:23.8 | HIP 85354 | 9.55 |
| 2026-06-16 00:00 | 17:26:02.83 | -13:16:58.8 | HIP 85354 | 10.09 |
| 2026-06-16 12:00 | 17:25:48.58 | -13:15:34.4 | HIP 85354 | 11.85 |
| 2026-06-17 00:00 | 17:25:34.37 | -13:14:10.6 | HIP 85208 | 13.11 |
| 2026-06-17 12:00 | 17:25:20.20 | -13:12:47.5 | HIP 85208 | 10.40 |
| 2026-06-18 00:00 | 17:25:06.06 | -13:11:25.0 | HIP 85208 | 8.49 |
| 2026-06-18 12:00 | 17:24:51.97 | -13:10:03.2 | HIP 85208 | 7.95 |
| 2026-06-19 00:00 | 17:24:37.93 | -13:08:42.0 | HIP 85208 | 9.03 |
| 2026-06-19 12:00 | 17:24:23.94 | -13:07:21.5 | HIP 85208 | 11.24 |
| 2026-06-20 00:00 | 17:24:09.99 | -13:06:01.7 | HIP 85208 | 14.06 |
| 2026-06-20 12:00 | 17:23:56.10 | -13:04:42.5 | HIP 85208 | 17.18 |
| 2026-06-21 00:00 | 17:23:42.26 | -13:03:24.0 | HIP 85208 | 20.44 |
| 2026-06-21 12:00 | 17:23:28.48 | -13:02:06.2 | HIP 85029 | 20.62 |
| 2026-06-22 00:00 | 17:23:14.76 | -13:00:49.0 | HIP 85029 | 17.93 |