メタデータ
| 項目 |
値 |
| Designation |
C/2025 A3 (Tsuchinshan) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2026-03-14T23:49:32.926080Z |
| Orbit solution date (soln_date, UTC) |
2026-03-07T14:43:12Z |
| Obs used |
90 |
| NEO |
- |
| M1 |
13.500 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2025-01-05T19:43:38.208000Z |
| Discovery magnitude (MPC) |
19.60 R |
| Discovery observatory (MPC) |
D29 · Purple Mountain Observatory, XuYi Station |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2025-02-20.0000000 |
| e |
0.43150980 |
| q (au) |
5.792581 |
| a (au) |
10.189412 |
| i (deg) |
9.977569 |
| Ω (om, deg) |
322.434479 |
| ω (w, deg) |
222.298095 |
| M (ma, deg) |
348.242798 |
等級
散乱 + 全体線形
$$
M_a = (12.211 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.211 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| 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
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) |
| 2026-03-26 00:00 |
12:06:12.43 |
-09:38:42.7 |
HIP 59060 |
16.05 |
| 2026-03-26 12:00 |
12:06:00.13 |
-09:37:49.3 |
HIP 59060 |
17.00 |
| 2026-03-27 00:00 |
12:05:47.84 |
-09:36:55.5 |
HIP 59060 |
18.44 |
| 2026-03-27 12:00 |
12:05:35.57 |
-09:36:01.3 |
HIP 58936 |
18.97 |
| 2026-03-28 00:00 |
12:05:23.32 |
-09:35:06.6 |
HIP 58936 |
17.14 |
| 2026-03-28 12:00 |
12:05:11.10 |
-09:34:11.6 |
HIP 58936 |
15.73 |
| 2026-03-29 00:00 |
12:04:58.89 |
-09:33:16.2 |
HIP 58936 |
14.86 |
| 2026-03-29 12:00 |
12:04:46.71 |
-09:32:20.5 |
HIP 58865 |
12.87 |
| 2026-03-30 00:00 |
12:04:34.56 |
-09:31:24.4 |
HIP 58865 |
10.66 |
| 2026-03-30 12:00 |
12:04:22.44 |
-09:30:27.9 |
HIP 58865 |
9.02 |
| 2026-03-31 00:00 |
12:04:10.35 |
-09:29:31.1 |
HIP 58865 |
8.27 |
| 2026-03-31 12:00 |
12:03:58.30 |
-09:28:34.1 |
HIP 58865 |
8.66 |
| 2026-04-01 00:00 |
12:03:46.28 |
-09:27:36.7 |
HIP 58865 |
10.04 |
| 2026-04-01 12:00 |
12:03:34.30 |
-09:26:39.0 |
HIP 58865 |
12.08 |
| 2026-04-02 00:00 |
12:03:22.37 |
-09:25:41.1 |
HIP 58865 |
14.49 |
| 2026-04-02 12:00 |
12:03:10.47 |
-09:24:43.0 |
HIP 58865 |
17.11 |
| 2026-04-03 00:00 |
12:02:58.62 |
-09:23:44.5 |
HIP 58865 |
19.85 |
| 2026-04-03 12:00 |
12:02:46.82 |
-09:22:45.9 |
HIP 58865 |
22.67 |
| 2026-04-04 00:00 |
12:02:35.06 |
-09:21:47.0 |
HIP 58865 |
25.54 |
| 2026-04-04 12:00 |
12:02:23.36 |
-09:20:48.0 |
HIP 58865 |
28.43 |
| 2026-04-05 00:00 |
12:02:11.71 |
-09:19:48.7 |
HIP 58865 |
31.35 |
| 2026-04-05 12:00 |
12:02:00.11 |
-09:18:49.3 |
HIP 58865 |
34.27 |
| 2026-04-06 00:00 |
12:01:48.57 |
-09:17:49.7 |
HIP 58865 |
37.19 |
| 2026-04-06 12:00 |
12:01:37.10 |
-09:16:50.0 |
HIP 58437 |
39.99 |
| 2026-04-07 00:00 |
12:01:25.68 |
-09:15:50.2 |
HIP 58437 |
37.24 |
| 2026-04-07 12:00 |
12:01:14.32 |
-09:14:50.2 |
HIP 58437 |
34.55 |
| 2026-04-08 00:00 |
12:01:03.03 |
-09:13:50.1 |
HIP 58437 |
31.93 |
| 2026-04-08 12:00 |
12:00:51.81 |
-09:12:50.0 |
HIP 58437 |
29.39 |
| 2026-04-09 00:00 |
12:00:40.65 |
-09:11:49.7 |
HIP 58437 |
26.94 |
| 2026-04-09 12:00 |
12:00:29.57 |
-09:10:49.4 |
HIP 58437 |
24.62 |
| 2026-04-10 00:00 |
12:00:18.56 |
-09:09:49.1 |
HIP 58437 |
22.46 |
| 2026-04-10 12:00 |
12:00:07.62 |
-09:08:48.7 |
HIP 58437 |
20.49 |
| 2026-04-11 00:00 |
11:59:56.76 |
-09:07:48.4 |
HIP 58437 |
18.78 |
| 2026-04-11 12:00 |
11:59:45.98 |
-09:06:48.0 |
HIP 58437 |
17.38 |
| 2026-04-12 00:00 |
11:59:35.28 |
-09:05:47.6 |
HIP 58437 |
16.38 |
| 2026-04-12 12:00 |
11:59:24.67 |
-09:04:47.3 |
HIP 58437 |
15.83 |
| 2026-04-13 00:00 |
11:59:14.13 |
-09:03:47.0 |
HIP 58437 |
15.77 |
| 2026-04-13 12:00 |
11:59:03.69 |
-09:02:46.7 |
HIP 58437 |
16.21 |
| 2026-04-14 00:00 |
11:58:53.33 |
-09:01:46.5 |
HIP 58437 |
17.08 |
| 2026-04-14 12:00 |
11:58:43.06 |
-09:00:46.5 |
HIP 58437 |
18.32 |
| 2026-04-15 00:00 |
11:58:32.88 |
-08:59:46.5 |
HIP 58437 |
19.86 |
| 2026-04-15 12:00 |
11:58:22.80 |
-08:58:46.6 |
HIP 58437 |
21.61 |
| 2026-04-16 00:00 |
11:58:12.82 |
-08:57:46.9 |
HIP 58437 |
23.53 |