メタデータ
| 項目 |
値 |
| Designation |
C/2018 S3 (TESS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2016-06-29T12:55:24.101760Z |
| Orbit solution date (soln_date, UTC) |
2023-02-23T19:42:03Z |
| Obs used |
35 |
| NEO |
- |
| M1 |
10.400 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2018-09-22T09:14:41.107200Z |
| Discovery magnitude (MPC) |
18.80 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) |
2017-03-08.0000000 |
| e |
1.00131593 |
| q (au) |
7.999920 |
| a (au) |
-6079.309391 |
| i (deg) |
78.418208 |
| Ω (om, deg) |
24.982385 |
| ω (w, deg) |
263.852517 |
| M (ma, deg) |
0.000523 |
等級
散乱 + 全体線形
$$
M_a = (11.026 + 4.379\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.026 |
| n |
4.379 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.800 |
| δ90 |
10.000 |
| 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) |
| 2026-05-12 00:00 |
01:32:29.58 |
+16:51:44.4 |
HIP 7143 |
8.15 |
| 2026-05-12 12:00 |
01:32:34.10 |
+16:52:30.7 |
HIP 7143 |
8.61 |
| 2026-05-13 00:00 |
01:32:38.61 |
+16:53:17.0 |
HIP 7143 |
9.23 |
| 2026-05-13 12:00 |
01:32:43.09 |
+16:54:03.3 |
HIP 7143 |
9.98 |
| 2026-05-14 00:00 |
01:32:47.56 |
+16:54:49.5 |
HIP 7143 |
10.84 |
| 2026-05-14 12:00 |
01:32:52.01 |
+16:55:35.7 |
HIP 7143 |
11.78 |
| 2026-05-15 00:00 |
01:32:56.43 |
+16:56:21.8 |
HIP 7143 |
12.78 |
| 2026-05-15 12:00 |
01:33:00.84 |
+16:57:07.9 |
HIP 7143 |
13.82 |
| 2026-05-16 00:00 |
01:33:05.23 |
+16:57:54.0 |
HIP 7143 |
14.90 |
| 2026-05-16 12:00 |
01:33:09.59 |
+16:58:40.0 |
HIP 7143 |
16.01 |
| 2026-05-17 00:00 |
01:33:13.94 |
+16:59:25.9 |
HIP 7143 |
17.14 |
| 2026-05-17 12:00 |
01:33:18.26 |
+17:00:11.9 |
HIP 7143 |
18.29 |
| 2026-05-18 00:00 |
01:33:22.56 |
+17:00:57.7 |
HIP 7143 |
19.45 |
| 2026-05-18 12:00 |
01:33:26.84 |
+17:01:43.5 |
HIP 7143 |
20.61 |
| 2026-05-19 00:00 |
01:33:31.09 |
+17:02:29.2 |
HIP 7143 |
21.79 |
| 2026-05-19 12:00 |
01:33:35.33 |
+17:03:14.9 |
HIP 7143 |
22.97 |
| 2026-05-20 00:00 |
01:33:39.54 |
+17:04:00.5 |
HIP 7143 |
24.15 |
| 2026-05-20 12:00 |
01:33:43.72 |
+17:04:46.1 |
HIP 7143 |
25.33 |
| 2026-05-21 00:00 |
01:33:47.88 |
+17:05:31.6 |
HIP 7143 |
26.52 |
| 2026-05-21 12:00 |
01:33:52.02 |
+17:06:17.0 |
HIP 7143 |
27.70 |
| 2026-05-22 00:00 |
01:33:56.14 |
+17:07:02.4 |
HIP 7143 |
28.88 |
| 2026-05-22 12:00 |
01:34:00.23 |
+17:07:47.7 |
HIP 7143 |
30.07 |
| 2026-05-23 00:00 |
01:34:04.29 |
+17:08:32.9 |
HIP 7143 |
31.25 |
| 2026-05-23 12:00 |
01:34:08.33 |
+17:09:18.1 |
HIP 7447 |
30.40 |
| 2026-05-24 00:00 |
01:34:12.35 |
+17:10:03.1 |
HIP 7447 |
29.18 |
| 2026-05-24 12:00 |
01:34:16.34 |
+17:10:48.1 |
HIP 7447 |
27.98 |
| 2026-05-25 00:00 |
01:34:20.30 |
+17:11:33.1 |
HIP 7447 |
26.77 |
| 2026-05-25 12:00 |
01:34:24.24 |
+17:12:17.9 |
HIP 7447 |
25.58 |
| 2026-05-26 00:00 |
01:34:28.15 |
+17:13:02.7 |
HIP 7447 |
24.39 |
| 2026-05-26 12:00 |
01:34:32.03 |
+17:13:47.4 |
HIP 7447 |
23.21 |
| 2026-05-27 00:00 |
01:34:35.89 |
+17:14:32.0 |
HIP 7447 |
22.04 |
| 2026-05-27 12:00 |
01:34:39.72 |
+17:15:16.5 |
HIP 7447 |
20.87 |
| 2026-05-28 00:00 |
01:34:43.52 |
+17:16:00.9 |
HIP 7447 |
19.71 |
| 2026-05-28 12:00 |
01:34:47.30 |
+17:16:45.3 |
HIP 7447 |
18.56 |
| 2026-05-29 00:00 |
01:34:51.04 |
+17:17:29.5 |
HIP 7447 |
17.42 |
| 2026-05-29 12:00 |
01:34:54.76 |
+17:18:13.7 |
HIP 7447 |
16.28 |
| 2026-05-30 00:00 |
01:34:58.45 |
+17:18:57.7 |
HIP 7447 |
15.16 |
| 2026-05-30 12:00 |
01:35:02.12 |
+17:19:41.7 |
HIP 7447 |
14.05 |
| 2026-05-31 00:00 |
01:35:05.75 |
+17:20:25.6 |
HIP 7447 |
12.94 |
| 2026-05-31 12:00 |
01:35:09.35 |
+17:21:09.4 |
HIP 7447 |
11.86 |
| 2026-06-01 00:00 |
01:35:12.93 |
+17:21:53.1 |
HIP 7447 |
10.78 |
| 2026-06-01 12:00 |
01:35:16.48 |
+17:22:36.7 |
HIP 7447 |
9.73 |
| 2026-06-02 00:00 |
01:35:19.99 |
+17:23:20.2 |
HIP 7447 |
8.70 |