メタデータ
| 項目 |
値 |
| Designation |
C/2019 M4 (TESS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2019-09-10T05:31:11.516160Z |
| Orbit solution date (soln_date, UTC) |
2023-05-11T17:42:03Z |
| Obs used |
88 |
| NEO |
- |
| M1 |
4.600 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2019-06-27T02:44:30.768000Z |
| Discovery magnitude (MPC) |
18.90 G |
| Discovery observatory (MPC) |
C57 · TESS |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2019-09-26.0000000 |
| e |
1.00453441 |
| q (au) |
9.181017 |
| a (au) |
-2024.743895 |
| i (deg) |
65.710801 |
| Ω (om, deg) |
52.573407 |
| ω (w, deg) |
260.252031 |
| M (ma, deg) |
0.000171 |
等級
散乱 + 全体線形
$$
M_a = (-1.187 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
-1.187 |
| n |
6.000 |
| gf |
0.965 |
| gb |
-0.974 |
| k |
1.000 |
| δ90 |
9.950 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
02:58:55.21 |
-00:33:45.6 |
HIP 13946 |
11.36 |
| 2026-03-26 12:00 |
02:59:00.64 |
-00:32:33.3 |
HIP 13946 |
10.62 |
| 2026-03-27 00:00 |
02:59:06.10 |
-00:31:21.1 |
HIP 13946 |
10.14 |
| 2026-03-27 12:00 |
02:59:11.60 |
-00:30:09.0 |
HIP 13946 |
9.97 |
| 2026-03-28 00:00 |
02:59:17.14 |
-00:28:57.0 |
HIP 13946 |
10.12 |
| 2026-03-28 12:00 |
02:59:22.71 |
-00:27:45.1 |
HIP 13946 |
10.59 |
| 2026-03-29 00:00 |
02:59:28.31 |
-00:26:33.4 |
HIP 13946 |
11.34 |
| 2026-03-29 12:00 |
02:59:33.94 |
-00:25:21.7 |
HIP 13946 |
12.31 |
| 2026-03-30 00:00 |
02:59:39.61 |
-00:24:10.2 |
HIP 13946 |
13.47 |
| 2026-03-30 12:00 |
02:59:45.30 |
-00:22:58.8 |
HIP 13946 |
14.77 |
| 2026-03-31 00:00 |
02:59:51.03 |
-00:21:47.5 |
HIP 13946 |
16.18 |
| 2026-03-31 12:00 |
02:59:56.79 |
-00:20:36.4 |
HIP 13946 |
17.67 |
| 2026-04-01 00:00 |
03:00:02.58 |
-00:19:25.4 |
HIP 14033 |
15.84 |
| 2026-04-01 12:00 |
03:00:08.41 |
-00:18:14.5 |
HIP 14033 |
14.02 |
| 2026-04-02 00:00 |
03:00:14.26 |
-00:17:03.7 |
HIP 14033 |
12.20 |
| 2026-04-02 12:00 |
03:00:20.14 |
-00:15:53.0 |
HIP 14033 |
10.41 |
| 2026-04-03 00:00 |
03:00:26.05 |
-00:14:42.5 |
HIP 14033 |
8.65 |
| 2026-04-03 12:00 |
03:00:31.99 |
-00:13:32.2 |
HIP 14033 |
6.96 |
| 2026-04-04 00:00 |
03:00:37.96 |
-00:12:21.9 |
HIP 14033 |
5.41 |
| 2026-04-04 12:00 |
03:00:43.95 |
-00:11:11.9 |
HIP 14033 |
4.16 |
| 2026-04-05 00:00 |
03:00:49.98 |
-00:10:01.9 |
HIP 14033 |
3.54 |
| 2026-04-05 12:00 |
03:00:56.03 |
-00:08:52.1 |
HIP 14033 |
3.89 |
| 2026-04-06 00:00 |
03:01:02.11 |
-00:07:42.4 |
HIP 14033 |
5.01 |
| 2026-04-06 12:00 |
03:01:08.21 |
-00:06:32.9 |
HIP 14033 |
6.51 |
| 2026-04-07 00:00 |
03:01:14.35 |
-00:05:23.6 |
HIP 14033 |
8.20 |
| 2026-04-07 12:00 |
03:01:20.50 |
-00:04:14.4 |
HIP 14033 |
9.97 |
| 2026-04-08 00:00 |
03:01:26.69 |
-00:03:05.3 |
HIP 14033 |
11.80 |
| 2026-04-08 12:00 |
03:01:32.90 |
-00:01:56.4 |
HIP 14033 |
13.66 |
| 2026-04-09 00:00 |
03:01:39.13 |
-00:00:47.7 |
HIP 14033 |
15.54 |
| 2026-04-09 12:00 |
03:01:45.39 |
+00:00:20.9 |
HIP 14033 |
17.44 |
| 2026-04-10 00:00 |
03:01:51.67 |
+00:01:29.3 |
HIP 14033 |
19.35 |
| 2026-04-10 12:00 |
03:01:57.98 |
+00:02:37.6 |
HIP 14033 |
21.27 |
| 2026-04-11 00:00 |
03:02:04.31 |
+00:03:45.6 |
HIP 14033 |
23.20 |
| 2026-04-11 12:00 |
03:02:10.66 |
+00:04:53.6 |
HIP 14113 |
25.11 |
| 2026-04-12 00:00 |
03:02:17.03 |
+00:06:01.3 |
HIP 14113 |
24.21 |
| 2026-04-12 12:00 |
03:02:23.43 |
+00:07:08.9 |
HIP 14113 |
23.45 |
| 2026-04-13 00:00 |
03:02:29.85 |
+00:08:16.3 |
HIP 14113 |
22.83 |
| 2026-04-13 12:00 |
03:02:36.29 |
+00:09:23.5 |
HIP 14113 |
22.37 |
| 2026-04-14 00:00 |
03:02:42.75 |
+00:10:30.6 |
HIP 14113 |
22.08 |
| 2026-04-14 12:00 |
03:02:49.24 |
+00:11:37.4 |
HIP 14113 |
21.97 |
| 2026-04-15 00:00 |
03:02:55.74 |
+00:12:44.1 |
HIP 14113 |
22.04 |
| 2026-04-15 12:00 |
03:03:02.26 |
+00:13:50.6 |
HIP 14113 |
22.29 |
| 2026-04-16 00:00 |
03:03:08.80 |
+00:14:56.9 |
HIP 14113 |
22.71 |