| 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) |
| 2026-05-12 00:00 |
12:02:00.73 |
-22:51:32.7 |
HIP 58849 |
41.98 |
| 2026-05-12 12:00 |
12:01:54.81 |
-22:49:04.7 |
HIP 58849 |
41.33 |
| 2026-05-13 00:00 |
12:01:49.09 |
-22:46:37.4 |
HIP 58849 |
40.83 |
| 2026-05-13 12:00 |
12:01:43.57 |
-22:44:10.6 |
HIP 58753 |
39.23 |
| 2026-05-14 00:00 |
12:01:38.26 |
-22:41:44.6 |
HIP 58753 |
37.67 |
| 2026-05-14 12:00 |
12:01:33.14 |
-22:39:19.2 |
HIP 58753 |
36.24 |
| 2026-05-15 00:00 |
12:01:28.23 |
-22:36:54.5 |
HIP 58753 |
34.94 |
| 2026-05-15 12:00 |
12:01:23.52 |
-22:34:30.6 |
HIP 58753 |
33.77 |
| 2026-05-16 00:00 |
12:01:19.01 |
-22:32:07.4 |
HIP 58753 |
32.76 |
| 2026-05-16 12:00 |
12:01:14.70 |
-22:29:45.0 |
HIP 58753 |
31.89 |
| 2026-05-17 00:00 |
12:01:10.59 |
-22:27:23.3 |
HIP 58753 |
31.19 |
| 2026-05-17 12:00 |
12:01:06.69 |
-22:25:02.5 |
HIP 58753 |
30.65 |
| 2026-05-18 00:00 |
12:01:02.98 |
-22:22:42.4 |
HIP 58753 |
30.27 |
| 2026-05-18 12:00 |
12:00:59.48 |
-22:20:23.2 |
HIP 58562 |
28.46 |
| 2026-05-19 00:00 |
12:00:56.19 |
-22:18:04.9 |
HIP 58562 |
26.04 |
| 2026-05-19 12:00 |
12:00:53.09 |
-22:15:47.4 |
HIP 58562 |
23.64 |
| 2026-05-20 00:00 |
12:00:50.19 |
-22:13:30.8 |
HIP 58562 |
21.27 |
| 2026-05-20 12:00 |
12:00:47.50 |
-22:11:15.1 |
HIP 58562 |
18.93 |
| 2026-05-21 00:00 |
12:00:45.00 |
-22:09:00.3 |
HIP 58562 |
16.61 |
| 2026-05-21 12:00 |
12:00:42.71 |
-22:06:46.4 |
HIP 58562 |
14.31 |
| 2026-05-22 00:00 |
12:00:40.62 |
-22:04:33.5 |
HIP 58562 |
12.05 |
| 2026-05-22 12:00 |
12:00:38.72 |
-22:02:21.5 |
HIP 58562 |
9.80 |
| 2026-05-23 00:00 |
12:00:37.03 |
-22:00:10.5 |
HIP 58562 |
7.59 |
| 2026-05-23 12:00 |
12:00:35.53 |
-21:58:00.4 |
HIP 58562 |
5.40 |
| 2026-05-24 00:00 |
12:00:34.23 |
-21:55:51.3 |
HIP 58562 |
3.26 |
| 2026-05-24 12:00 |
12:00:33.13 |
-21:53:43.3 |
HIP 58562 |
1.26 |
| 2026-05-25 00:00 |
12:00:32.23 |
-21:51:36.2 |
HIP 58562 |
1.36 |
| 2026-05-25 12:00 |
12:00:31.52 |
-21:49:30.2 |
HIP 58574 |
2.60 |
| 2026-05-26 00:00 |
12:00:31.00 |
-21:47:25.2 |
HIP 58574 |
3.85 |
| 2026-05-26 12:00 |
12:00:30.69 |
-21:45:21.2 |
HIP 58574 |
5.58 |
| 2026-05-27 00:00 |
12:00:30.56 |
-21:43:18.3 |
HIP 58574 |
7.45 |
| 2026-05-27 12:00 |
12:00:30.64 |
-21:41:16.4 |
HIP 58574 |
9.37 |
| 2026-05-28 00:00 |
12:00:30.90 |
-21:39:15.6 |
HIP 58574 |
11.30 |
| 2026-05-28 12:00 |
12:00:31.36 |
-21:37:15.9 |
HIP 58574 |
13.23 |
| 2026-05-29 00:00 |
12:00:32.00 |
-21:35:17.2 |
HIP 58629 |
12.45 |
| 2026-05-29 12:00 |
12:00:32.84 |
-21:33:19.7 |
HIP 58629 |
11.88 |
| 2026-05-30 00:00 |
12:00:33.88 |
-21:31:23.2 |
HIP 58629 |
11.58 |
| 2026-05-30 12:00 |
12:00:35.10 |
-21:29:27.9 |
HIP 58629 |
11.55 |
| 2026-05-31 00:00 |
12:00:36.50 |
-21:27:33.6 |
HIP 58629 |
11.80 |
| 2026-05-31 12:00 |
12:00:38.10 |
-21:25:40.5 |
HIP 58596 |
11.53 |
| 2026-06-01 00:00 |
12:00:39.89 |
-21:23:48.6 |
HIP 58596 |
9.66 |
| 2026-06-01 12:00 |
12:00:41.86 |
-21:21:57.7 |
HIP 58596 |
7.80 |
| 2026-06-02 00:00 |
12:00:44.02 |
-21:20:08.0 |
HIP 58596 |
5.96 |