| Parameter |
Value |
| Designation |
448P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2022-09-08T00:31:25.878720Z |
| Orbit solution date (soln_date, UTC) |
2024-08-11T00:12:25Z |
| Obs used |
184 |
| NEO |
- |
| M1 |
18.000 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2008-10-01T09:02:51.072000Z |
| Discovery magnitude (MPC) |
20.00 V |
| Discovery observatory (MPC) |
703 · Catalina Sky Survey |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2019-04-24.0000000 |
| e |
0.41897178 |
| q (au) |
2.109134 |
| a (au) |
3.630003 |
| i (deg) |
12.152893 |
| Ω (om, deg) |
161.780755 |
| ω (w, deg) |
219.028807 |
| M (ma, deg) |
184.282775 |
Magnitude
Scatter + Global Linear
$$
M_a = (19.465 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
19.465 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.629 |
| k |
0.800 |
| δ90 |
10.000 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
13:24:47.10 |
+01:58:16.8 |
HIP 65564 |
30.25 |
| 2026-05-12 12:00 |
13:24:33.54 |
+01:59:25.0 |
HIP 65564 |
33.78 |
| 2026-05-13 00:00 |
13:24:20.10 |
+02:00:31.8 |
HIP 65405 |
36.55 |
| 2026-05-13 12:00 |
13:24:06.79 |
+02:01:37.4 |
HIP 65198 |
36.44 |
| 2026-05-14 00:00 |
13:23:53.62 |
+02:02:41.6 |
HIP 65198 |
33.06 |
| 2026-05-14 12:00 |
13:23:40.57 |
+02:03:44.5 |
HIP 65198 |
29.74 |
| 2026-05-15 00:00 |
13:23:27.66 |
+02:04:46.0 |
HIP 65198 |
26.48 |
| 2026-05-15 12:00 |
13:23:14.89 |
+02:05:46.2 |
HIP 65198 |
23.29 |
| 2026-05-16 00:00 |
13:23:02.26 |
+02:06:45.0 |
HIP 65198 |
20.19 |
| 2026-05-16 12:00 |
13:22:49.76 |
+02:07:42.5 |
HIP 65198 |
17.19 |
| 2026-05-17 00:00 |
13:22:37.41 |
+02:08:38.6 |
HIP 65198 |
14.33 |
| 2026-05-17 12:00 |
13:22:25.20 |
+02:09:33.4 |
HIP 65198 |
11.70 |
| 2026-05-18 00:00 |
13:22:13.13 |
+02:10:26.8 |
HIP 65198 |
9.42 |
| 2026-05-18 12:00 |
13:22:01.21 |
+02:11:18.9 |
HIP 65198 |
7.79 |
| 2026-05-19 00:00 |
13:21:49.44 |
+02:12:09.5 |
HIP 65198 |
7.18 |
| 2026-05-19 12:00 |
13:21:37.82 |
+02:12:58.8 |
HIP 65198 |
7.80 |
| 2026-05-20 00:00 |
13:21:26.35 |
+02:13:46.7 |
HIP 65198 |
9.36 |
| 2026-05-20 12:00 |
13:21:15.03 |
+02:14:33.2 |
HIP 65198 |
11.45 |
| 2026-05-21 00:00 |
13:21:03.86 |
+02:15:18.4 |
HIP 65198 |
13.80 |
| 2026-05-21 12:00 |
13:20:52.85 |
+02:16:02.2 |
HIP 65198 |
16.29 |
| 2026-05-22 00:00 |
13:20:42.00 |
+02:16:44.6 |
HIP 65198 |
18.83 |
| 2026-05-22 12:00 |
13:20:31.30 |
+02:17:25.6 |
HIP 65198 |
21.39 |
| 2026-05-23 00:00 |
13:20:20.77 |
+02:18:05.2 |
HIP 65198 |
23.95 |
| 2026-05-23 12:00 |
13:20:10.39 |
+02:18:43.5 |
HIP 64959 |
23.58 |
| 2026-05-24 00:00 |
13:20:00.17 |
+02:19:20.3 |
HIP 64959 |
21.18 |
| 2026-05-24 12:00 |
13:19:50.11 |
+02:19:55.8 |
HIP 64959 |
18.88 |
| 2026-05-25 00:00 |
13:19:40.22 |
+02:20:29.9 |
HIP 64959 |
16.72 |
| 2026-05-25 12:00 |
13:19:30.49 |
+02:21:02.7 |
HIP 64959 |
14.71 |
| 2026-05-26 00:00 |
13:19:20.92 |
+02:21:34.0 |
HIP 64959 |
12.92 |
| 2026-05-26 12:00 |
13:19:11.52 |
+02:22:04.0 |
HIP 64959 |
11.41 |
| 2026-05-27 00:00 |
13:19:02.29 |
+02:22:32.6 |
HIP 64959 |
10.28 |
| 2026-05-27 12:00 |
13:18:53.22 |
+02:22:59.9 |
HIP 64959 |
9.62 |
| 2026-05-28 00:00 |
13:18:44.32 |
+02:23:25.8 |
HIP 64959 |
9.51 |
| 2026-05-28 12:00 |
13:18:35.58 |
+02:23:50.3 |
HIP 64959 |
9.92 |
| 2026-05-29 00:00 |
13:18:27.02 |
+02:24:13.4 |
HIP 64959 |
10.78 |
| 2026-05-29 12:00 |
13:18:18.62 |
+02:24:35.2 |
HIP 64959 |
11.96 |
| 2026-05-30 00:00 |
13:18:10.40 |
+02:24:55.6 |
HIP 64959 |
13.36 |
| 2026-05-30 12:00 |
13:18:02.35 |
+02:25:14.7 |
HIP 64959 |
14.88 |
| 2026-05-31 00:00 |
13:17:54.46 |
+02:25:32.4 |
HIP 64959 |
16.49 |
| 2026-05-31 12:00 |
13:17:46.75 |
+02:25:48.7 |
HIP 64959 |
18.15 |
| 2026-06-01 00:00 |
13:17:39.22 |
+02:26:03.7 |
HIP 64802 |
18.78 |
| 2026-06-01 12:00 |
13:17:31.85 |
+02:26:17.3 |
HIP 64802 |
17.90 |
| 2026-06-02 00:00 |
13:17:24.66 |
+02:26:29.6 |
HIP 64802 |
17.18 |