| Parameter |
Value |
| Designation |
P/2024 T1 (Rankin) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2024-09-30T10:53:27.006720Z |
| Orbit solution date (soln_date, UTC) |
2025-02-20T14:12:25Z |
| Obs used |
158 |
| NEO |
- |
| M1 |
16.100 |
| K1 |
4.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-10-02T11:50:41.510400Z |
| Discovery magnitude (MPC) |
19.82 G |
| Discovery observatory (MPC) |
G96 · Mt. Lemmon Survey |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2024-11-28.0000000 |
| e |
0.65385983 |
| q (au) |
2.287077 |
| a (au) |
6.607373 |
| i (deg) |
17.619161 |
| Ω (om, deg) |
279.709192 |
| ω (w, deg) |
164.882104 |
| M (ma, deg) |
3.397502 |
Magnitude
Scatter + Global Linear
$$
M_a = (11.598 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
11.598 |
| n |
6.000 |
| gf |
0.941 |
| gb |
-0.766 |
| k |
0.997 |
| δ90 |
7.690 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
12:23:41.61 |
-26:34:18.1 |
HIP 60426 |
7.45 |
| 2026-03-26 12:00 |
12:23:22.92 |
-26:32:39.5 |
HIP 60426 |
4.37 |
| 2026-03-27 00:00 |
12:23:04.25 |
-26:30:59.3 |
HIP 60426 |
4.79 |
| 2026-03-27 12:00 |
12:22:45.60 |
-26:29:17.3 |
HIP 60426 |
8.20 |
| 2026-03-28 00:00 |
12:22:26.97 |
-26:27:33.7 |
HIP 60426 |
12.33 |
| 2026-03-28 12:00 |
12:22:08.37 |
-26:25:48.5 |
HIP 60426 |
16.66 |
| 2026-03-29 00:00 |
12:21:49.81 |
-26:24:01.7 |
HIP 60426 |
21.06 |
| 2026-03-29 12:00 |
12:21:31.27 |
-26:22:13.2 |
HIP 60253 |
21.98 |
| 2026-03-30 00:00 |
12:21:12.78 |
-26:20:23.3 |
HIP 60253 |
23.57 |
| 2026-03-30 12:00 |
12:20:54.33 |
-26:18:31.7 |
HIP 60096 |
22.97 |
| 2026-03-31 00:00 |
12:20:35.92 |
-26:16:38.7 |
HIP 60096 |
18.48 |
| 2026-03-31 12:00 |
12:20:17.56 |
-26:14:44.1 |
HIP 60096 |
14.01 |
| 2026-04-01 00:00 |
12:19:59.26 |
-26:12:48.1 |
HIP 60096 |
9.59 |
| 2026-04-01 12:00 |
12:19:41.00 |
-26:10:50.6 |
HIP 60096 |
5.38 |
| 2026-04-02 00:00 |
12:19:22.81 |
-26:08:51.7 |
HIP 60096 |
2.64 |
| 2026-04-02 12:00 |
12:19:04.67 |
-26:06:51.4 |
HIP 60096 |
5.10 |
| 2026-04-03 00:00 |
12:18:46.60 |
-26:04:49.7 |
HIP 60096 |
9.28 |
| 2026-04-03 12:00 |
12:18:28.59 |
-26:02:46.6 |
HIP 60096 |
13.68 |
| 2026-04-04 00:00 |
12:18:10.66 |
-26:00:42.2 |
HIP 60096 |
18.14 |
| 2026-04-04 12:00 |
12:17:52.79 |
-25:58:36.5 |
HIP 60096 |
22.62 |
| 2026-04-05 00:00 |
12:17:35.01 |
-25:56:29.5 |
HIP 60096 |
27.11 |
| 2026-04-05 12:00 |
12:17:17.30 |
-25:54:21.2 |
HIP 60096 |
31.61 |
| 2026-04-06 00:00 |
12:16:59.67 |
-25:52:11.7 |
HIP 60096 |
36.10 |
| 2026-04-06 12:00 |
12:16:42.13 |
-25:50:00.9 |
HIP 59871 |
33.83 |
| 2026-04-07 00:00 |
12:16:24.68 |
-25:47:49.0 |
HIP 59871 |
31.92 |
| 2026-04-07 12:00 |
12:16:07.31 |
-25:45:35.8 |
HIP 59871 |
30.54 |
| 2026-04-08 00:00 |
12:15:50.04 |
-25:43:21.6 |
HIP 59871 |
29.76 |
| 2026-04-08 12:00 |
12:15:32.87 |
-25:41:06.2 |
HIP 59871 |
29.62 |
| 2026-04-09 00:00 |
12:15:15.79 |
-25:38:49.7 |
HIP 59616 |
28.49 |
| 2026-04-09 12:00 |
12:14:58.82 |
-25:36:32.2 |
HIP 59616 |
27.02 |
| 2026-04-10 00:00 |
12:14:41.95 |
-25:34:13.6 |
HIP 59616 |
26.26 |
| 2026-04-10 12:00 |
12:14:25.20 |
-25:31:54.0 |
HIP 59616 |
26.27 |
| 2026-04-11 00:00 |
12:14:08.55 |
-25:29:33.4 |
HIP 59616 |
27.03 |
| 2026-04-11 12:00 |
12:13:52.01 |
-25:27:11.9 |
HIP 59616 |
28.49 |
| 2026-04-12 00:00 |
12:13:35.59 |
-25:24:49.4 |
HIP 59616 |
30.54 |
| 2026-04-12 12:00 |
12:13:19.29 |
-25:22:26.1 |
HIP 59616 |
33.07 |
| 2026-04-13 00:00 |
12:13:03.11 |
-25:20:01.8 |
HIP 59563 |
30.43 |
| 2026-04-13 12:00 |
12:12:47.06 |
-25:17:36.7 |
HIP 59563 |
27.95 |
| 2026-04-14 00:00 |
12:12:31.13 |
-25:15:10.8 |
HIP 59563 |
25.96 |
| 2026-04-14 12:00 |
12:12:15.33 |
-25:12:44.1 |
HIP 59563 |
24.56 |
| 2026-04-15 00:00 |
12:11:59.66 |
-25:10:16.6 |
HIP 59563 |
23.85 |
| 2026-04-15 12:00 |
12:11:44.13 |
-25:07:48.4 |
HIP 59350 |
19.95 |
| 2026-04-16 00:00 |
12:11:28.73 |
-25:05:19.4 |
HIP 59350 |
15.69 |