| Parameter |
Value |
| Designation |
379P/Spacewatch |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2019-08-01T06:53:15.374400Z |
| Orbit solution date (soln_date, UTC) |
2026-05-22T14:12:34Z |
| Obs used |
141 |
| NEO |
- |
| M1 |
15.500 |
| K1 |
8.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2019-02-28T09:07:17.184000Z |
| Discovery magnitude (MPC) |
20.10 G |
| Discovery observatory (MPC) |
G96 · University of Arizona Mt. Lemmon Survey |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2017-02-23.0000000 |
| e |
0.33782357 |
| q (au) |
2.335975 |
| a (au) |
3.527722 |
| i (deg) |
12.385855 |
| Ω (om, deg) |
184.043485 |
| ω (w, deg) |
31.061161 |
| M (ma, deg) |
227.716892 |
Magnitude
Scatter + Global Linear
$$
M_a = (18.722 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
18.722 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| 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) |
| 2026-06-01 00:00 |
16:21:49.07 |
-02:00:08.4 |
HIP 80120 |
11.44 |
| 2026-06-01 12:00 |
16:21:29.44 |
-01:58:31.3 |
HIP 80120 |
7.16 |
| 2026-06-02 00:00 |
16:21:09.89 |
-01:56:57.8 |
HIP 80120 |
5.03 |
| 2026-06-02 12:00 |
16:20:50.43 |
-01:55:27.9 |
HIP 80120 |
7.21 |
| 2026-06-03 00:00 |
16:20:31.07 |
-01:54:01.6 |
HIP 80069 |
8.29 |
| 2026-06-03 12:00 |
16:20:11.81 |
-01:52:38.8 |
HIP 80069 |
8.77 |
| 2026-06-04 00:00 |
16:19:52.67 |
-01:51:19.7 |
HIP 80069 |
11.64 |
| 2026-06-04 12:00 |
16:19:33.65 |
-01:50:04.2 |
HIP 80069 |
15.58 |
| 2026-06-05 00:00 |
16:19:14.75 |
-01:48:52.3 |
HIP 80069 |
19.94 |
| 2026-06-05 12:00 |
16:18:55.98 |
-01:47:44.0 |
HIP 80069 |
24.46 |
| 2026-06-06 00:00 |
16:18:37.35 |
-01:46:39.4 |
HIP 80069 |
29.05 |
| 2026-06-06 12:00 |
16:18:18.87 |
-01:45:38.4 |
HIP 79730 |
30.54 |
| 2026-06-07 00:00 |
16:18:00.54 |
-01:44:41.0 |
HIP 79730 |
25.86 |
| 2026-06-07 12:00 |
16:17:42.37 |
-01:43:47.3 |
HIP 79730 |
21.24 |
| 2026-06-08 00:00 |
16:17:24.37 |
-01:42:57.2 |
HIP 79730 |
16.67 |
| 2026-06-08 12:00 |
16:17:06.53 |
-01:42:10.7 |
HIP 79730 |
12.16 |
| 2026-06-09 00:00 |
16:16:48.88 |
-01:41:27.8 |
HIP 79730 |
7.74 |
| 2026-06-09 12:00 |
16:16:31.42 |
-01:40:48.6 |
HIP 79730 |
3.51 |
| 2026-06-10 00:00 |
16:16:14.14 |
-01:40:13.1 |
HIP 79730 |
1.92 |
| 2026-06-10 12:00 |
16:15:57.07 |
-01:39:41.1 |
HIP 79730 |
5.71 |
| 2026-06-11 00:00 |
16:15:40.19 |
-01:39:12.8 |
HIP 79730 |
9.87 |
| 2026-06-11 12:00 |
16:15:23.53 |
-01:38:48.0 |
HIP 79730 |
14.03 |
| 2026-06-12 00:00 |
16:15:07.09 |
-01:38:26.9 |
HIP 79730 |
18.15 |
| 2026-06-12 12:00 |
16:14:50.87 |
-01:38:09.4 |
HIP 79522 |
20.47 |
| 2026-06-13 00:00 |
16:14:34.87 |
-01:37:55.4 |
HIP 79522 |
16.92 |
| 2026-06-13 12:00 |
16:14:19.12 |
-01:37:45.0 |
HIP 79522 |
13.70 |
| 2026-06-14 00:00 |
16:14:03.60 |
-01:37:38.2 |
HIP 79522 |
11.06 |
| 2026-06-14 12:00 |
16:13:48.33 |
-01:37:35.0 |
HIP 79522 |
9.39 |
| 2026-06-15 00:00 |
16:13:33.32 |
-01:37:35.2 |
HIP 79522 |
9.18 |
| 2026-06-15 12:00 |
16:13:18.56 |
-01:37:39.0 |
HIP 79443 |
9.98 |
| 2026-06-16 00:00 |
16:13:04.06 |
-01:37:46.3 |
HIP 79443 |
7.20 |
| 2026-06-16 12:00 |
16:12:49.84 |
-01:37:57.1 |
HIP 79443 |
5.46 |
| 2026-06-17 00:00 |
16:12:35.89 |
-01:38:11.3 |
HIP 79443 |
5.68 |
| 2026-06-17 12:00 |
16:12:22.22 |
-01:38:28.9 |
HIP 79443 |
7.60 |
| 2026-06-18 00:00 |
16:12:08.83 |
-01:38:50.0 |
HIP 79443 |
10.24 |
| 2026-06-18 12:00 |
16:11:55.73 |
-01:39:14.4 |
HIP 79443 |
13.13 |
| 2026-06-19 00:00 |
16:11:42.92 |
-01:39:42.2 |
HIP 79443 |
16.10 |
| 2026-06-19 12:00 |
16:11:30.41 |
-01:40:13.4 |
HIP 79443 |
19.07 |
| 2026-06-20 00:00 |
16:11:18.20 |
-01:40:47.8 |
HIP 79206 |
20.20 |
| 2026-06-20 12:00 |
16:11:06.29 |
-01:41:25.6 |
HIP 79206 |
17.44 |
| 2026-06-21 00:00 |
16:10:54.69 |
-01:42:06.5 |
HIP 79206 |
14.88 |
| 2026-06-21 12:00 |
16:10:43.40 |
-01:42:50.7 |
HIP 79206 |
12.60 |
| 2026-06-22 00:00 |
16:10:32.43 |
-01:43:38.1 |
HIP 79206 |
10.74 |