314P/Montani
| Parameter |
Value |
| Designation |
314P/Montani |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-10-07T20:49:44.149440Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:21Z |
| Obs used |
384 |
| NEO |
- |
| M1 |
12.600 |
| K1 |
5.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2011-10-21.0000000 |
| e |
0.41595010 |
| q (au) |
4.249163 |
| a (au) |
7.275343 |
| i (deg) |
3.976588 |
| Ω (om, deg) |
267.703383 |
| ω (w, deg) |
213.407905 |
| M (ma, deg) |
268.897663 |
Magnitude
Scatter + Global Linear
$$
M_a = (10.942 + 2.639\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
10.942 |
| n |
2.639 |
| gf |
1.000 |
| gb |
-0.944 |
| k |
1.000 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
20:03:12.56 |
-18:33:16.2 |
HIP 98707 |
4.22 |
| 2026-02-03 12:00 |
20:03:25.79 |
-18:32:33.4 |
HIP 98707 |
7.33 |
| 2026-02-04 00:00 |
20:03:38.99 |
-18:31:50.6 |
HIP 98707 |
10.50 |
| 2026-02-04 12:00 |
20:03:52.17 |
-18:31:07.7 |
HIP 98707 |
13.68 |
| 2026-02-05 00:00 |
20:04:05.33 |
-18:30:24.8 |
HIP 98707 |
16.87 |
| 2026-02-05 12:00 |
20:04:18.46 |
-18:29:41.9 |
HIP 98901 |
19.54 |
| 2026-02-06 00:00 |
20:04:31.56 |
-18:28:58.9 |
HIP 98901 |
18.75 |
| 2026-02-06 12:00 |
20:04:44.65 |
-18:28:15.9 |
HIP 98901 |
18.48 |
| 2026-02-07 00:00 |
20:04:57.70 |
-18:27:32.9 |
HIP 98901 |
18.76 |
| 2026-02-07 12:00 |
20:05:10.73 |
-18:26:49.9 |
HIP 98901 |
19.55 |
| 2026-02-08 00:00 |
20:05:23.74 |
-18:26:06.8 |
HIP 99042 |
17.35 |
| 2026-02-08 12:00 |
20:05:36.71 |
-18:25:23.7 |
HIP 99042 |
14.29 |
| 2026-02-09 00:00 |
20:05:49.66 |
-18:24:40.6 |
HIP 99042 |
11.29 |
| 2026-02-09 12:00 |
20:06:02.58 |
-18:23:57.5 |
HIP 99042 |
8.40 |
| 2026-02-10 00:00 |
20:06:15.47 |
-18:23:14.3 |
HIP 99042 |
5.80 |
| 2026-02-10 12:00 |
20:06:28.32 |
-18:22:31.1 |
HIP 99042 |
4.05 |
| 2026-02-11 00:00 |
20:06:41.15 |
-18:21:47.9 |
HIP 99042 |
4.34 |
| 2026-02-11 12:00 |
20:06:53.95 |
-18:21:04.8 |
HIP 99042 |
6.38 |
| 2026-02-12 00:00 |
20:07:06.72 |
-18:20:21.6 |
HIP 99042 |
9.05 |
| 2026-02-12 12:00 |
20:07:19.45 |
-18:19:38.4 |
HIP 99042 |
11.93 |
| 2026-02-13 00:00 |
20:07:32.15 |
-18:18:55.1 |
HIP 99042 |
14.90 |
| 2026-02-13 12:00 |
20:07:44.82 |
-18:18:11.9 |
HIP 99042 |
17.90 |
| 2026-02-14 00:00 |
20:07:57.45 |
-18:17:28.7 |
HIP 99247 |
19.85 |
| 2026-02-14 12:00 |
20:08:10.05 |
-18:16:45.5 |
HIP 99247 |
17.58 |
| 2026-02-15 00:00 |
20:08:22.61 |
-18:16:02.3 |
HIP 99247 |
15.58 |
| 2026-02-15 12:00 |
20:08:35.13 |
-18:15:19.1 |
HIP 99247 |
13.99 |
| 2026-02-16 00:00 |
20:08:47.62 |
-18:14:36.0 |
HIP 99247 |
12.93 |
| 2026-02-16 12:00 |
20:09:00.08 |
-18:13:52.8 |
HIP 99333 |
12.12 |
| 2026-02-17 00:00 |
20:09:12.49 |
-18:13:09.7 |
HIP 99333 |
10.36 |
| 2026-02-17 12:00 |
20:09:24.87 |
-18:12:26.5 |
HIP 99333 |
9.29 |
| 2026-02-18 00:00 |
20:09:37.20 |
-18:11:43.4 |
HIP 99333 |
9.14 |
| 2026-02-18 12:00 |
20:09:49.50 |
-18:11:00.4 |
HIP 99333 |
9.95 |
| 2026-02-19 00:00 |
20:10:01.76 |
-18:10:17.3 |
HIP 99333 |
11.51 |
| 2026-02-19 12:00 |
20:10:13.97 |
-18:09:34.3 |
HIP 99333 |
13.55 |
| 2026-02-20 00:00 |
20:10:26.15 |
-18:08:51.3 |
HIP 99333 |
15.89 |
| 2026-02-20 12:00 |
20:10:38.28 |
-18:08:08.4 |
HIP 99333 |
18.41 |
| 2026-02-21 00:00 |
20:10:50.37 |
-18:07:25.4 |
HIP 99468 |
19.14 |
| 2026-02-21 12:00 |
20:11:02.41 |
-18:06:42.6 |
HIP 99557 |
17.36 |
| 2026-02-22 00:00 |
20:11:14.42 |
-18:05:59.7 |
HIP 99557 |
14.65 |
| 2026-02-22 12:00 |
20:11:26.38 |
-18:05:16.9 |
HIP 99557 |
12.06 |
| 2026-02-23 00:00 |
20:11:38.29 |
-18:04:34.2 |
HIP 99557 |
9.67 |
| 2026-02-23 12:00 |
20:11:50.16 |
-18:03:51.5 |
HIP 99557 |
7.66 |
| 2026-02-24 00:00 |
20:12:01.98 |
-18:03:08.9 |
HIP 99557 |
6.39 |