| Parameter |
Value |
| Designation |
C/2026 M3 (MASTER) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2027-02-15T14:52:09.318720Z |
| Orbit solution date (soln_date, UTC) |
2026-09-08T09:12:18Z |
| Obs used |
236 |
| NEO |
- |
| M1 |
9.300 |
| K1 |
4.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2026-06-19T07:14:07.872000Z |
| Discovery magnitude (MPC) |
20.30 R |
| Discovery observatory (MPC) |
V18 · MASTER-OAGH Observatory, Sonora |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2026-07-12.0000000 |
| e |
1.00090384 |
| q (au) |
12.051524 |
| a (au) |
-13333.716815 |
| i (deg) |
93.896602 |
| Ω (om, deg) |
282.367583 |
| ω (w, deg) |
51.149941 |
| M (ma, deg) |
-0.000140 |
Magnitude
Scatter + Global Linear
$$
M_a = (-2.716 + 5.999\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
-2.716 |
| n |
5.999 |
| gf |
0.955 |
| gb |
-0.581 |
| k |
1.000 |
| δ90 |
9.882 |
| 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 |
18:04:20.48 |
+23:07:36.8 |
HIP 88568 |
15.91 |
| 2026-09-20 12:00 |
18:04:19.03 |
+23:06:49.1 |
HIP 88568 |
15.50 |
| 2026-09-21 00:00 |
18:04:17.67 |
+23:06:01.4 |
HIP 88568 |
15.10 |
| 2026-09-21 12:00 |
18:04:16.41 |
+23:05:13.7 |
HIP 88568 |
14.73 |
| 2026-09-22 00:00 |
18:04:15.23 |
+23:04:26.1 |
HIP 88568 |
14.38 |
| 2026-09-22 12:00 |
18:04:14.15 |
+23:03:38.4 |
HIP 88568 |
14.06 |
| 2026-09-23 00:00 |
18:04:13.17 |
+23:02:50.8 |
HIP 88568 |
13.76 |
| 2026-09-23 12:00 |
18:04:12.27 |
+23:02:03.2 |
HIP 88568 |
13.49 |
| 2026-09-24 00:00 |
18:04:11.47 |
+23:01:15.6 |
HIP 88568 |
13.25 |
| 2026-09-24 12:00 |
18:04:10.75 |
+23:00:28.1 |
HIP 88568 |
13.03 |
| 2026-09-25 00:00 |
18:04:10.13 |
+22:59:40.7 |
HIP 88568 |
12.84 |
| 2026-09-25 12:00 |
18:04:09.60 |
+22:58:53.3 |
HIP 88568 |
12.68 |
| 2026-09-26 00:00 |
18:04:09.16 |
+22:58:06.0 |
HIP 88568 |
12.55 |
| 2026-09-26 12:00 |
18:04:08.82 |
+22:57:18.8 |
HIP 88568 |
12.45 |
| 2026-09-27 00:00 |
18:04:08.56 |
+22:56:31.6 |
HIP 88568 |
12.38 |
| 2026-09-27 12:00 |
18:04:08.39 |
+22:55:44.6 |
HIP 88568 |
12.34 |
| 2026-09-28 00:00 |
18:04:08.32 |
+22:54:57.6 |
HIP 88568 |
12.33 |
| 2026-09-28 12:00 |
18:04:08.33 |
+22:54:10.8 |
HIP 88568 |
12.34 |
| 2026-09-29 00:00 |
18:04:08.43 |
+22:53:24.1 |
HIP 88568 |
12.39 |
| 2026-09-29 12:00 |
18:04:08.63 |
+22:52:37.4 |
HIP 88480 |
11.88 |
| 2026-09-30 00:00 |
18:04:08.91 |
+22:51:50.9 |
HIP 88480 |
11.13 |
| 2026-09-30 12:00 |
18:04:09.29 |
+22:51:04.6 |
HIP 88480 |
10.38 |
| 2026-10-01 00:00 |
18:04:09.75 |
+22:50:18.4 |
HIP 88480 |
9.65 |
| 2026-10-01 12:00 |
18:04:10.30 |
+22:49:32.3 |
HIP 88480 |
8.93 |
| 2026-10-02 00:00 |
18:04:10.94 |
+22:48:46.4 |
HIP 88480 |
8.23 |
| 2026-10-02 12:00 |
18:04:11.67 |
+22:48:00.7 |
HIP 88480 |
7.56 |
| 2026-10-03 00:00 |
18:04:12.49 |
+22:47:15.1 |
HIP 88480 |
6.92 |
| 2026-10-03 12:00 |
18:04:13.40 |
+22:46:29.7 |
HIP 88480 |
6.32 |
| 2026-10-04 00:00 |
18:04:14.40 |
+22:45:44.5 |
HIP 88480 |
5.78 |
| 2026-10-04 12:00 |
18:04:15.48 |
+22:44:59.4 |
HIP 88480 |
5.32 |
| 2026-10-05 00:00 |
18:04:16.65 |
+22:44:14.6 |
HIP 88480 |
4.96 |
| 2026-10-05 12:00 |
18:04:17.91 |
+22:43:30.0 |
HIP 88480 |
4.73 |
| 2026-10-06 00:00 |
18:04:19.26 |
+22:42:45.6 |
HIP 88480 |
4.65 |
| 2026-10-06 12:00 |
18:04:20.70 |
+22:42:01.4 |
HIP 88480 |
4.72 |
| 2026-10-07 00:00 |
18:04:22.22 |
+22:41:17.5 |
HIP 88480 |
4.95 |
| 2026-10-07 12:00 |
18:04:23.83 |
+22:40:33.7 |
HIP 88480 |
5.31 |
| 2026-10-08 00:00 |
18:04:25.53 |
+22:39:50.3 |
HIP 88480 |
5.79 |
| 2026-10-08 12:00 |
18:04:27.31 |
+22:39:07.0 |
HIP 88480 |
6.35 |
| 2026-10-09 00:00 |
18:04:29.18 |
+22:38:24.1 |
HIP 88480 |
6.99 |
| 2026-10-09 12:00 |
18:04:31.13 |
+22:37:41.4 |
HIP 88480 |
7.68 |
| 2026-10-10 00:00 |
18:04:33.18 |
+22:36:59.0 |
HIP 88480 |
8.41 |
| 2026-10-10 12:00 |
18:04:35.30 |
+22:36:16.8 |
HIP 88480 |
9.18 |
| 2026-10-11 00:00 |
18:04:37.51 |
+22:35:35.0 |
HIP 88480 |
9.98 |