メタデータ
| 項目 |
値 |
| Designation |
C/2026 M3 (MASTER) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2027-01-13T23:58:16.250880Z |
| Orbit solution date (soln_date, UTC) |
2026-07-28T14:12:18Z |
| Obs used |
206 |
| 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 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2026-07-07.0000000 |
| e |
1.00513660 |
| q (au) |
12.073133 |
| a (au) |
-2350.414085 |
| i (deg) |
93.967299 |
| Ω (om, deg) |
282.435147 |
| ω (w, deg) |
50.067362 |
| M (ma, deg) |
-0.001652 |
等級
散乱 + 全体線形
$$
M_a = (5.268 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
5.268 |
| n |
6.000 |
| gf |
0.835 |
| gb |
-0.938 |
| k |
0.804 |
| δ90 |
4.452 |
| パラメータ |
記号 |
範囲 |
説明 |
| 太陽・地球距離が1 AUのときの絶対等級 |
H0 |
-5 to 20 |
彗星の固有の明るさ |
| 測光スロープパラメータ |
n |
2 to 6 |
太陽距離に対する明るさ変化率 |
| 前方散乱非対称係数 |
gf |
0.8 to 1 |
前方散乱の強さ |
| 後方散乱非対称係数 |
gb |
-1 to -0.5 |
後方散乱の強さ |
| 分配係数 |
k |
0.8 to 1 |
前方/後方散乱の寄与比 |
| ダスト/ガス明るさ比 |
δ90 |
1 to 10 |
ダスト散乱とガス放射の相対寄与 |
参考: EPSC-DPS2025-160
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
18:15:15.25 |
+24:03:13.4 |
HIP 89491 |
7.81 |
| 2026-07-29 12:00 |
18:15:05.09 |
+24:03:12.5 |
HIP 89491 |
9.94 |
| 2026-07-30 00:00 |
18:14:54.99 |
+24:03:10.8 |
HIP 89491 |
12.12 |
| 2026-07-30 12:00 |
18:14:44.94 |
+24:03:08.3 |
HIP 89491 |
14.32 |
| 2026-07-31 00:00 |
18:14:34.95 |
+24:03:04.9 |
HIP 89491 |
16.54 |
| 2026-07-31 12:00 |
18:14:25.02 |
+24:03:00.8 |
HIP 89491 |
18.75 |
| 2026-08-01 00:00 |
18:14:15.14 |
+24:02:55.9 |
HIP 89491 |
20.97 |
| 2026-08-01 12:00 |
18:14:05.33 |
+24:02:50.1 |
HIP 89491 |
23.17 |
| 2026-08-02 00:00 |
18:13:55.57 |
+24:02:43.6 |
HIP 89491 |
25.37 |
| 2026-08-02 12:00 |
18:13:45.88 |
+24:02:36.3 |
HIP 89247 |
25.38 |
| 2026-08-03 00:00 |
18:13:36.24 |
+24:02:28.2 |
HIP 89247 |
24.34 |
| 2026-08-03 12:00 |
18:13:26.67 |
+24:02:19.3 |
HIP 89247 |
23.47 |
| 2026-08-04 00:00 |
18:13:17.17 |
+24:02:09.7 |
HIP 89247 |
22.79 |
| 2026-08-04 12:00 |
18:13:07.72 |
+24:01:59.3 |
HIP 89247 |
22.32 |
| 2026-08-05 00:00 |
18:12:58.35 |
+24:01:48.2 |
HIP 89247 |
22.07 |
| 2026-08-05 12:00 |
18:12:49.03 |
+24:01:36.3 |
HIP 89247 |
22.05 |
| 2026-08-06 00:00 |
18:12:39.78 |
+24:01:23.6 |
HIP 89247 |
22.23 |
| 2026-08-06 12:00 |
18:12:30.60 |
+24:01:10.2 |
HIP 89247 |
22.63 |
| 2026-08-07 00:00 |
18:12:21.49 |
+24:00:56.1 |
HIP 89247 |
23.22 |
| 2026-08-07 12:00 |
18:12:12.44 |
+24:00:41.3 |
HIP 89247 |
23.99 |
| 2026-08-08 00:00 |
18:12:03.46 |
+24:00:25.7 |
HIP 89247 |
24.91 |
| 2026-08-08 12:00 |
18:11:54.56 |
+24:00:09.4 |
HIP 89247 |
25.96 |
| 2026-08-09 00:00 |
18:11:45.72 |
+23:59:52.4 |
HIP 89247 |
27.14 |
| 2026-08-09 12:00 |
18:11:36.95 |
+23:59:34.7 |
HIP 89004 |
25.47 |
| 2026-08-10 00:00 |
18:11:28.26 |
+23:59:16.4 |
HIP 89004 |
23.81 |
| 2026-08-10 12:00 |
18:11:19.63 |
+23:58:57.3 |
HIP 89004 |
22.24 |
| 2026-08-11 00:00 |
18:11:11.08 |
+23:58:37.5 |
HIP 89004 |
20.75 |
| 2026-08-11 12:00 |
18:11:02.61 |
+23:58:17.1 |
HIP 89004 |
19.38 |
| 2026-08-12 00:00 |
18:10:54.20 |
+23:57:56.1 |
HIP 89004 |
18.13 |
| 2026-08-12 12:00 |
18:10:45.88 |
+23:57:34.3 |
HIP 89004 |
17.03 |
| 2026-08-13 00:00 |
18:10:37.62 |
+23:57:11.9 |
HIP 89004 |
16.12 |
| 2026-08-13 12:00 |
18:10:29.45 |
+23:56:48.9 |
HIP 89004 |
15.40 |
| 2026-08-14 00:00 |
18:10:21.35 |
+23:56:25.3 |
HIP 89004 |
14.92 |
| 2026-08-14 12:00 |
18:10:13.33 |
+23:56:01.0 |
HIP 89004 |
14.68 |
| 2026-08-15 00:00 |
18:10:05.38 |
+23:55:36.1 |
HIP 89004 |
14.68 |
| 2026-08-15 12:00 |
18:09:57.52 |
+23:55:10.6 |
HIP 89004 |
14.94 |
| 2026-08-16 00:00 |
18:09:49.73 |
+23:54:44.5 |
HIP 89004 |
15.42 |
| 2026-08-16 12:00 |
18:09:42.02 |
+23:54:17.8 |
HIP 89004 |
16.10 |
| 2026-08-17 00:00 |
18:09:34.39 |
+23:53:50.6 |
HIP 89004 |
16.95 |
| 2026-08-17 12:00 |
18:09:26.85 |
+23:53:22.7 |
HIP 88913 |
17.35 |
| 2026-08-18 00:00 |
18:09:19.38 |
+23:52:54.3 |
HIP 88913 |
17.24 |
| 2026-08-18 12:00 |
18:09:11.99 |
+23:52:25.4 |
HIP 88913 |
17.33 |
| 2026-08-19 00:00 |
18:09:04.69 |
+23:51:55.8 |
HIP 88913 |
17.61 |