448P/PANSTARRS
| 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) |
| 2026-02-03 00:00 |
14:00:20.75 |
-03:52:53.7 |
HIP 68380 |
21.41 |
| 2026-02-03 12:00 |
14:00:24.09 |
-03:52:00.6 |
HIP 68380 |
20.92 |
| 2026-02-04 00:00 |
14:00:27.25 |
-03:51:06.3 |
HIP 68380 |
20.45 |
| 2026-02-04 12:00 |
14:00:30.22 |
-03:50:10.8 |
HIP 68380 |
20.00 |
| 2026-02-05 00:00 |
14:00:33.00 |
-03:49:14.2 |
HIP 68380 |
19.58 |
| 2026-02-05 12:00 |
14:00:35.59 |
-03:48:16.5 |
HIP 68380 |
19.17 |
| 2026-02-06 00:00 |
14:00:38.00 |
-03:47:17.6 |
HIP 68380 |
18.78 |
| 2026-02-06 12:00 |
14:00:40.21 |
-03:46:17.5 |
HIP 68380 |
18.40 |
| 2026-02-07 00:00 |
14:00:42.23 |
-03:45:16.4 |
HIP 68380 |
18.04 |
| 2026-02-07 12:00 |
14:00:44.06 |
-03:44:14.0 |
HIP 68380 |
17.70 |
| 2026-02-08 00:00 |
14:00:45.70 |
-03:43:10.6 |
HIP 68380 |
17.38 |
| 2026-02-08 12:00 |
14:00:47.14 |
-03:42:06.0 |
HIP 68380 |
17.07 |
| 2026-02-09 00:00 |
14:00:48.39 |
-03:41:00.2 |
HIP 68380 |
16.79 |
| 2026-02-09 12:00 |
14:00:49.45 |
-03:39:53.3 |
HIP 68380 |
16.52 |
| 2026-02-10 00:00 |
14:00:50.32 |
-03:38:45.3 |
HIP 68380 |
16.28 |
| 2026-02-10 12:00 |
14:00:50.99 |
-03:37:36.2 |
HIP 68380 |
16.07 |
| 2026-02-11 00:00 |
14:00:51.46 |
-03:36:25.9 |
HIP 68380 |
15.89 |
| 2026-02-11 12:00 |
14:00:51.74 |
-03:35:14.5 |
HIP 68380 |
15.75 |
| 2026-02-12 00:00 |
14:00:51.83 |
-03:34:02.0 |
HIP 68380 |
15.64 |
| 2026-02-12 12:00 |
14:00:51.72 |
-03:32:48.4 |
HIP 68380 |
15.58 |
| 2026-02-13 00:00 |
14:00:51.41 |
-03:31:33.6 |
HIP 68380 |
15.56 |
| 2026-02-13 12:00 |
14:00:50.91 |
-03:30:17.8 |
HIP 68380 |
15.61 |
| 2026-02-14 00:00 |
14:00:50.21 |
-03:29:00.8 |
HIP 68380 |
15.71 |
| 2026-02-14 12:00 |
14:00:49.32 |
-03:27:42.7 |
HIP 68380 |
15.88 |
| 2026-02-15 00:00 |
14:00:48.22 |
-03:26:23.6 |
HIP 68380 |
16.11 |
| 2026-02-15 12:00 |
14:00:46.93 |
-03:25:03.3 |
HIP 68380 |
16.42 |
| 2026-02-16 00:00 |
14:00:45.45 |
-03:23:42.0 |
HIP 68380 |
16.81 |
| 2026-02-16 12:00 |
14:00:43.76 |
-03:22:19.6 |
HIP 68380 |
17.27 |
| 2026-02-17 00:00 |
14:00:41.88 |
-03:20:56.1 |
HIP 68380 |
17.81 |
| 2026-02-17 12:00 |
14:00:39.80 |
-03:19:31.5 |
HIP 68380 |
18.44 |
| 2026-02-18 00:00 |
14:00:37.53 |
-03:18:05.9 |
HIP 68380 |
19.14 |
| 2026-02-18 12:00 |
14:00:35.05 |
-03:16:39.2 |
HIP 68380 |
19.92 |
| 2026-02-19 00:00 |
14:00:32.38 |
-03:15:11.5 |
HIP 68380 |
20.79 |
| 2026-02-19 12:00 |
14:00:29.51 |
-03:13:42.7 |
HIP 68380 |
21.73 |
| 2026-02-20 00:00 |
14:00:26.45 |
-03:12:12.9 |
HIP 68380 |
22.74 |
| 2026-02-20 12:00 |
14:00:23.19 |
-03:10:42.0 |
HIP 68380 |
23.83 |
| 2026-02-21 00:00 |
14:00:19.73 |
-03:09:10.2 |
HIP 68380 |
24.99 |
| 2026-02-21 12:00 |
14:00:16.08 |
-03:07:37.3 |
HIP 68297 |
24.74 |
| 2026-02-22 00:00 |
14:00:12.23 |
-03:06:03.5 |
HIP 68297 |
23.12 |
| 2026-02-22 12:00 |
14:00:08.19 |
-03:04:28.6 |
HIP 68297 |
21.49 |
| 2026-02-23 00:00 |
14:00:03.95 |
-03:02:52.8 |
HIP 68297 |
19.86 |
| 2026-02-23 12:00 |
13:59:59.52 |
-03:01:15.9 |
HIP 68297 |
18.22 |
| 2026-02-24 00:00 |
13:59:54.90 |
-02:59:38.2 |
HIP 68297 |
16.61 |