| Parameter |
Value |
| Designation |
348P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-06-23T02:38:18.427200Z |
| Orbit solution date (soln_date, UTC) |
2022-03-08T19:44:06Z |
| Obs used |
84 |
| NEO |
- |
| M1 |
17.600 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2018-03-29.0000000 |
| e |
0.30165714 |
| q (au) |
2.213010 |
| a (au) |
3.168945 |
| i (deg) |
17.566297 |
| Ω (om, deg) |
313.555846 |
| ω (w, deg) |
134.165093 |
| M (ma, deg) |
112.497751 |
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) |
| 2026-07-29 00:00 |
23:14:50.38 |
+06:33:20.1 |
HIP 114891 |
22.23 |
| 2026-07-29 12:00 |
23:14:38.82 |
+06:35:36.1 |
HIP 114891 |
25.01 |
| 2026-07-30 00:00 |
23:14:26.95 |
+06:37:50.4 |
HIP 114588 |
25.00 |
| 2026-07-30 12:00 |
23:14:14.77 |
+06:40:02.9 |
HIP 114588 |
22.80 |
| 2026-07-31 00:00 |
23:14:02.29 |
+06:42:13.8 |
HIP 114588 |
20.97 |
| 2026-07-31 12:00 |
23:13:49.50 |
+06:44:22.8 |
HIP 114588 |
19.63 |
| 2026-08-01 00:00 |
23:13:36.40 |
+06:46:30.2 |
HIP 114588 |
18.91 |
| 2026-08-01 12:00 |
23:13:23.00 |
+06:48:35.7 |
HIP 114588 |
18.91 |
| 2026-08-02 00:00 |
23:13:09.29 |
+06:50:39.5 |
HIP 114588 |
19.67 |
| 2026-08-02 12:00 |
23:12:55.27 |
+06:52:41.4 |
HIP 114548 |
19.68 |
| 2026-08-03 00:00 |
23:12:40.95 |
+06:54:41.6 |
HIP 114548 |
19.79 |
| 2026-08-03 12:00 |
23:12:26.33 |
+06:56:39.8 |
HIP 114548 |
20.67 |
| 2026-08-04 00:00 |
23:12:11.41 |
+06:58:36.3 |
HIP 114548 |
22.27 |
| 2026-08-04 12:00 |
23:11:56.18 |
+07:00:30.8 |
HIP 114548 |
24.47 |
| 2026-08-05 00:00 |
23:11:40.65 |
+07:02:23.5 |
HIP 114548 |
27.14 |
| 2026-08-05 12:00 |
23:11:24.83 |
+07:04:14.2 |
HIP 114398 |
26.11 |
| 2026-08-06 00:00 |
23:11:08.70 |
+07:06:03.1 |
HIP 114398 |
21.97 |
| 2026-08-06 12:00 |
23:10:52.28 |
+07:07:49.9 |
HIP 114398 |
17.93 |
| 2026-08-07 00:00 |
23:10:35.57 |
+07:09:34.9 |
HIP 114398 |
14.12 |
| 2026-08-07 12:00 |
23:10:18.56 |
+07:11:17.9 |
HIP 114398 |
10.86 |
| 2026-08-08 00:00 |
23:10:01.26 |
+07:12:58.9 |
HIP 114398 |
8.87 |
| 2026-08-08 12:00 |
23:09:43.67 |
+07:14:37.8 |
HIP 114398 |
9.13 |
| 2026-08-09 00:00 |
23:09:25.79 |
+07:16:14.8 |
HIP 114398 |
11.55 |
| 2026-08-09 12:00 |
23:09:07.62 |
+07:17:49.8 |
HIP 114398 |
15.17 |
| 2026-08-10 00:00 |
23:08:49.18 |
+07:19:22.7 |
HIP 114398 |
19.38 |
| 2026-08-10 12:00 |
23:08:30.45 |
+07:20:53.6 |
HIP 114398 |
23.89 |
| 2026-08-11 00:00 |
23:08:11.44 |
+07:22:22.4 |
HIP 114130 |
21.30 |
| 2026-08-11 12:00 |
23:07:52.15 |
+07:23:49.2 |
HIP 114130 |
16.34 |
| 2026-08-12 00:00 |
23:07:32.60 |
+07:25:13.9 |
HIP 114130 |
11.39 |
| 2026-08-12 12:00 |
23:07:12.77 |
+07:26:36.5 |
HIP 114130 |
6.55 |
| 2026-08-13 00:00 |
23:06:52.67 |
+07:27:57.0 |
HIP 114130 |
2.89 |
| 2026-08-13 12:00 |
23:06:32.31 |
+07:29:15.4 |
HIP 114130 |
5.27 |
| 2026-08-14 00:00 |
23:06:11.69 |
+07:30:31.7 |
HIP 114130 |
10.14 |
| 2026-08-14 12:00 |
23:05:50.81 |
+07:31:45.8 |
HIP 114130 |
15.34 |
| 2026-08-15 00:00 |
23:05:29.68 |
+07:32:57.9 |
HIP 114130 |
20.66 |
| 2026-08-15 12:00 |
23:05:08.30 |
+07:34:07.8 |
HIP 113974 |
19.27 |
| 2026-08-16 00:00 |
23:04:46.67 |
+07:35:15.6 |
HIP 113974 |
17.92 |
| 2026-08-16 12:00 |
23:04:24.80 |
+07:36:21.3 |
HIP 113974 |
18.25 |
| 2026-08-17 00:00 |
23:04:02.69 |
+07:37:24.8 |
HIP 113811 |
17.46 |
| 2026-08-17 12:00 |
23:03:40.34 |
+07:38:26.2 |
HIP 113811 |
11.93 |
| 2026-08-18 00:00 |
23:03:17.76 |
+07:39:25.4 |
HIP 113811 |
6.53 |
| 2026-08-18 12:00 |
23:02:54.95 |
+07:40:22.4 |
HIP 113811 |
2.67 |
| 2026-08-19 00:00 |
23:02:31.92 |
+07:41:17.4 |
HIP 113811 |
6.13 |