メタデータ
| 項目 |
値 |
| Designation |
379P/Spacewatch |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2012-12-13T11:31:35.120640Z |
| Orbit solution date (soln_date, UTC) |
2026-03-31T09:42:41Z |
| Obs used |
110 |
| NEO |
- |
| M1 |
12.400 |
| K1 |
15.750 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2019-02-28T09:07:17.184000Z |
| Discovery magnitude (MPC) |
20.10 G |
| Discovery observatory (MPC) |
G96 · Mt. Lemmon Survey |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2014-09-20.0000000 |
| e |
0.33694981 |
| q (au) |
2.340581 |
| a (au) |
3.530021 |
| i (deg) |
12.380923 |
| Ω (om, deg) |
184.040681 |
| ω (w, deg) |
31.034034 |
| M (ma, deg) |
95.928491 |
等級
散乱 + 全体線形
$$
M_a = (18.663 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
18.663 |
| n |
2.000 |
| gf |
0.955 |
| 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
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 |
16:32:58.98 |
-10:20:52.5 |
HIP 81027 |
12.90 |
| 2026-03-26 12:00 |
16:33:19.57 |
-10:17:15.4 |
HIP 81027 |
17.51 |
| 2026-03-27 00:00 |
16:33:39.75 |
-10:13:36.6 |
HIP 81027 |
22.87 |
| 2026-03-27 12:00 |
16:33:59.53 |
-10:09:56.2 |
HIP 81027 |
28.52 |
| 2026-03-28 00:00 |
16:34:18.90 |
-10:06:14.1 |
HIP 81217 |
29.98 |
| 2026-03-28 12:00 |
16:34:37.85 |
-10:02:30.4 |
HIP 81217 |
24.50 |
| 2026-03-29 00:00 |
16:34:56.40 |
-09:58:45.2 |
HIP 81217 |
19.33 |
| 2026-03-29 12:00 |
16:35:14.53 |
-09:54:58.4 |
HIP 81217 |
14.70 |
| 2026-03-30 00:00 |
16:35:32.25 |
-09:51:10.0 |
HIP 81217 |
11.23 |
| 2026-03-30 12:00 |
16:35:49.55 |
-09:47:20.1 |
HIP 81217 |
10.07 |
| 2026-03-31 00:00 |
16:36:06.43 |
-09:43:28.7 |
HIP 81217 |
11.83 |
| 2026-03-31 12:00 |
16:36:22.89 |
-09:39:35.8 |
HIP 81217 |
15.48 |
| 2026-04-01 00:00 |
16:36:38.93 |
-09:35:41.5 |
HIP 81410 |
19.34 |
| 2026-04-01 12:00 |
16:36:54.54 |
-09:31:45.8 |
HIP 81410 |
19.84 |
| 2026-04-02 00:00 |
16:37:09.73 |
-09:27:48.6 |
HIP 81410 |
21.83 |
| 2026-04-02 12:00 |
16:37:24.50 |
-09:23:50.0 |
HIP 81410 |
24.90 |
| 2026-04-03 00:00 |
16:37:38.83 |
-09:19:50.1 |
HIP 81360 |
28.65 |
| 2026-04-03 12:00 |
16:37:52.74 |
-09:15:48.9 |
HIP 81360 |
26.59 |
| 2026-04-04 00:00 |
16:38:06.21 |
-09:11:46.3 |
HIP 81360 |
25.40 |
| 2026-04-04 12:00 |
16:38:19.25 |
-09:07:42.5 |
HIP 81360 |
25.15 |
| 2026-04-05 00:00 |
16:38:31.86 |
-09:03:37.4 |
HIP 81360 |
25.85 |
| 2026-04-05 12:00 |
16:38:44.03 |
-08:59:31.1 |
HIP 81499 |
22.42 |
| 2026-04-06 00:00 |
16:38:55.77 |
-08:55:23.6 |
HIP 81499 |
18.39 |
| 2026-04-06 12:00 |
16:39:07.07 |
-08:51:14.9 |
HIP 81499 |
14.92 |
| 2026-04-07 00:00 |
16:39:17.92 |
-08:47:05.1 |
HIP 81499 |
12.45 |
| 2026-04-07 12:00 |
16:39:28.34 |
-08:42:54.1 |
HIP 81499 |
11.59 |
| 2026-04-08 00:00 |
16:39:38.32 |
-08:38:42.1 |
HIP 81499 |
12.61 |
| 2026-04-08 12:00 |
16:39:47.85 |
-08:34:29.1 |
HIP 81499 |
15.09 |
| 2026-04-09 00:00 |
16:39:56.95 |
-08:30:15.0 |
HIP 81499 |
18.44 |
| 2026-04-09 12:00 |
16:40:05.59 |
-08:26:00.0 |
HIP 81663 |
14.60 |
| 2026-04-10 00:00 |
16:40:13.80 |
-08:21:44.0 |
HIP 81663 |
11.00 |
| 2026-04-10 12:00 |
16:40:21.56 |
-08:17:27.1 |
HIP 81663 |
8.70 |
| 2026-04-11 00:00 |
16:40:28.87 |
-08:13:09.4 |
HIP 81663 |
8.71 |
| 2026-04-11 12:00 |
16:40:35.73 |
-08:08:50.8 |
HIP 81663 |
10.99 |
| 2026-04-12 00:00 |
16:40:42.15 |
-08:04:31.4 |
HIP 81663 |
14.49 |
| 2026-04-12 12:00 |
16:40:48.12 |
-08:00:11.2 |
HIP 81744 |
16.02 |
| 2026-04-13 00:00 |
16:40:53.65 |
-07:55:50.3 |
HIP 81744 |
13.68 |
| 2026-04-13 12:00 |
16:40:58.73 |
-07:51:28.8 |
HIP 81744 |
12.72 |
| 2026-04-14 00:00 |
16:41:03.36 |
-07:47:06.6 |
HIP 81744 |
13.43 |
| 2026-04-14 12:00 |
16:41:07.54 |
-07:42:43.8 |
HIP 81744 |
15.57 |
| 2026-04-15 00:00 |
16:41:11.28 |
-07:38:20.4 |
HIP 81744 |
18.63 |
| 2026-04-15 12:00 |
16:41:14.57 |
-07:33:56.5 |
HIP 81744 |
22.23 |
| 2026-04-16 00:00 |
16:41:17.42 |
-07:29:32.2 |
HIP 81572 |
25.36 |