| Parameter |
Value |
| Designation |
348P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-06-23T16:28:51.234240Z |
| Orbit solution date (soln_date, UTC) |
2026-09-04T08:42:17Z |
| Obs used |
89 |
| NEO |
- |
| M1 |
17.000 |
| K1 |
6.000 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2018-08-25.0000000 |
| e |
0.30209484 |
| q (au) |
2.211372 |
| a (au) |
3.168585 |
| i (deg) |
17.577315 |
| Ω (om, deg) |
313.390963 |
| ω (w, deg) |
134.347807 |
| M (ma, deg) |
138.453175 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.638 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.638 |
| n |
6.000 |
| gf |
0.832 |
| gb |
-0.862 |
| k |
0.980 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
22:34:11.11 |
+07:29:20.3 |
HIP 111276 |
24.30 |
| 2026-09-20 12:00 |
22:33:45.38 |
+07:28:14.7 |
HIP 111276 |
17.83 |
| 2026-09-21 00:00 |
22:33:19.81 |
+07:27:08.0 |
HIP 111276 |
11.40 |
| 2026-09-21 12:00 |
22:32:54.42 |
+07:26:00.4 |
HIP 111276 |
5.01 |
| 2026-09-22 00:00 |
22:32:29.21 |
+07:24:51.7 |
HIP 111273 |
1.20 |
| 2026-09-22 12:00 |
22:32:04.18 |
+07:23:42.1 |
HIP 111273 |
7.51 |
| 2026-09-23 00:00 |
22:31:39.34 |
+07:22:31.5 |
HIP 111273 |
13.78 |
| 2026-09-23 12:00 |
22:31:14.71 |
+07:21:20.1 |
HIP 111273 |
20.00 |
| 2026-09-24 00:00 |
22:30:50.27 |
+07:20:07.8 |
HIP 111273 |
26.18 |
| 2026-09-24 12:00 |
22:30:26.04 |
+07:18:54.7 |
HIP 110995 |
25.20 |
| 2026-09-25 00:00 |
22:30:02.02 |
+07:17:40.8 |
HIP 110995 |
22.52 |
| 2026-09-25 12:00 |
22:29:38.23 |
+07:16:26.2 |
HIP 110995 |
21.31 |
| 2026-09-26 00:00 |
22:29:14.65 |
+07:15:10.9 |
HIP 110995 |
21.78 |
| 2026-09-26 12:00 |
22:28:51.30 |
+07:13:54.8 |
HIP 110850 |
20.92 |
| 2026-09-27 00:00 |
22:28:28.19 |
+07:12:38.2 |
HIP 110850 |
15.17 |
| 2026-09-27 12:00 |
22:28:05.31 |
+07:11:20.9 |
HIP 110850 |
9.63 |
| 2026-09-28 00:00 |
22:27:42.68 |
+07:10:03.1 |
HIP 110850 |
4.85 |
| 2026-09-28 12:00 |
22:27:20.29 |
+07:08:44.7 |
HIP 110850 |
4.55 |
| 2026-09-29 00:00 |
22:26:58.16 |
+07:07:25.8 |
HIP 110850 |
9.06 |
| 2026-09-29 12:00 |
22:26:36.28 |
+07:06:06.4 |
HIP 110850 |
14.34 |
| 2026-09-30 00:00 |
22:26:14.66 |
+07:04:46.7 |
HIP 110850 |
19.74 |
| 2026-09-30 12:00 |
22:25:53.31 |
+07:03:26.5 |
HIP 110850 |
25.13 |
| 2026-10-01 00:00 |
22:25:32.23 |
+07:02:05.9 |
HIP 110850 |
30.49 |
| 2026-10-01 12:00 |
22:25:11.42 |
+07:00:45.0 |
HIP 110782 |
34.81 |
| 2026-10-02 00:00 |
22:24:50.89 |
+06:59:23.9 |
HIP 110531 |
33.41 |
| 2026-10-02 12:00 |
22:24:30.64 |
+06:58:02.4 |
HIP 110531 |
29.51 |
| 2026-10-03 00:00 |
22:24:10.69 |
+06:56:40.8 |
HIP 110531 |
26.10 |
| 2026-10-03 12:00 |
22:23:51.02 |
+06:55:19.0 |
HIP 110531 |
23.33 |
| 2026-10-04 00:00 |
22:23:31.65 |
+06:53:57.0 |
HIP 110531 |
21.43 |
| 2026-10-04 12:00 |
22:23:12.57 |
+06:52:34.9 |
HIP 110531 |
20.57 |
| 2026-10-05 00:00 |
22:22:53.80 |
+06:51:12.8 |
HIP 110531 |
20.84 |
| 2026-10-05 12:00 |
22:22:35.34 |
+06:49:50.6 |
HIP 110465 |
21.45 |
| 2026-10-06 00:00 |
22:22:17.19 |
+06:48:28.4 |
HIP 110465 |
20.52 |
| 2026-10-06 12:00 |
22:21:59.36 |
+06:47:06.3 |
HIP 110349 |
18.67 |
| 2026-10-07 00:00 |
22:21:41.84 |
+06:45:44.2 |
HIP 110349 |
14.51 |
| 2026-10-07 12:00 |
22:21:24.65 |
+06:44:22.3 |
HIP 110349 |
10.73 |
| 2026-10-08 00:00 |
22:21:07.78 |
+06:43:00.5 |
HIP 110349 |
7.76 |
| 2026-10-08 12:00 |
22:20:51.24 |
+06:41:38.9 |
HIP 110349 |
6.61 |
| 2026-10-09 00:00 |
22:20:35.03 |
+06:40:17.6 |
HIP 110349 |
7.98 |
| 2026-10-09 12:00 |
22:20:19.16 |
+06:38:56.5 |
HIP 110349 |
10.86 |
| 2026-10-10 00:00 |
22:20:03.62 |
+06:37:35.7 |
HIP 110349 |
14.31 |
| 2026-10-10 12:00 |
22:19:48.43 |
+06:36:15.3 |
HIP 110349 |
17.94 |
| 2026-10-11 00:00 |
22:19:33.58 |
+06:34:55.2 |
HIP 110349 |
21.61 |