C/2022 N2 (PANSTARRS)
メタデータ
| 項目 |
値 |
| Designation |
C/2022 N2 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-07-31T18:05:44.736000Z |
| Orbit solution date (soln_date, UTC) |
2026-01-13T08:12:19Z |
| Obs used |
3285 |
| NEO |
- |
| M1 |
8.900 |
| K1 |
6.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-07-04T10:42:53.971200Z |
| Discovery magnitude (MPC) |
20.66 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
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 |
1.00329821 |
| q (au) |
3.825559 |
| a (au) |
-1159.888422 |
| i (deg) |
5.503097 |
| Ω (om, deg) |
319.741707 |
| ω (w, deg) |
75.385934 |
| M (ma, deg) |
-0.004036 |
等級
散乱 + 全体線形
$$
M_a = (9.009 + 3.839\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.009 |
| n |
3.839 |
| gf |
1.000 |
| gb |
-0.738 |
| 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) |
| 2026-02-03 00:00 |
03:22:30.23 |
+24:20:50.0 |
HIP 15560 |
30.45 |
| 2026-02-03 12:00 |
03:22:47.36 |
+24:21:02.3 |
HIP 15861 |
30.52 |
| 2026-02-04 00:00 |
03:23:04.69 |
+24:21:15.4 |
HIP 15861 |
27.82 |
| 2026-02-04 12:00 |
03:23:22.22 |
+24:21:29.2 |
HIP 15861 |
25.42 |
| 2026-02-05 00:00 |
03:23:39.95 |
+24:21:43.7 |
HIP 15861 |
23.42 |
| 2026-02-05 12:00 |
03:23:57.87 |
+24:21:59.0 |
HIP 15861 |
21.97 |
| 2026-02-06 00:00 |
03:24:15.99 |
+24:22:14.9 |
HIP 15861 |
21.21 |
| 2026-02-06 12:00 |
03:24:34.31 |
+24:22:31.6 |
HIP 15861 |
21.23 |
| 2026-02-07 00:00 |
03:24:52.83 |
+24:22:49.0 |
HIP 15861 |
22.06 |
| 2026-02-07 12:00 |
03:25:11.53 |
+24:23:07.1 |
HIP 15861 |
23.64 |
| 2026-02-08 00:00 |
03:25:30.43 |
+24:23:25.9 |
HIP 16074 |
21.08 |
| 2026-02-08 12:00 |
03:25:49.52 |
+24:23:45.5 |
HIP 16074 |
16.90 |
| 2026-02-09 00:00 |
03:26:08.81 |
+24:24:05.6 |
HIP 16074 |
12.80 |
| 2026-02-09 12:00 |
03:26:28.28 |
+24:24:26.5 |
HIP 16074 |
8.96 |
| 2026-02-10 00:00 |
03:26:47.94 |
+24:24:48.1 |
HIP 16074 |
6.02 |
| 2026-02-10 12:00 |
03:27:07.79 |
+24:25:10.3 |
HIP 16074 |
5.73 |
| 2026-02-11 00:00 |
03:27:27.82 |
+24:25:33.2 |
HIP 16074 |
8.43 |
| 2026-02-11 12:00 |
03:27:48.04 |
+24:25:56.7 |
HIP 16074 |
12.34 |
| 2026-02-12 00:00 |
03:28:08.45 |
+24:26:20.9 |
HIP 16132 |
15.97 |
| 2026-02-12 12:00 |
03:28:29.04 |
+24:26:45.8 |
HIP 16132 |
18.17 |
| 2026-02-13 00:00 |
03:28:49.81 |
+24:27:11.2 |
HIP 16305 |
18.97 |
| 2026-02-13 12:00 |
03:29:10.76 |
+24:27:37.3 |
HIP 16305 |
14.18 |
| 2026-02-14 00:00 |
03:29:31.90 |
+24:28:04.1 |
HIP 16305 |
9.35 |
| 2026-02-14 12:00 |
03:29:53.21 |
+24:28:31.4 |
HIP 16305 |
4.48 |
| 2026-02-15 00:00 |
03:30:14.70 |
+24:28:59.4 |
HIP 16305 |
0.51 |
| 2026-02-15 12:00 |
03:30:36.37 |
+24:29:28.0 |
HIP 16305 |
5.39 |
| 2026-02-16 00:00 |
03:30:58.21 |
+24:29:57.1 |
HIP 16305 |
10.38 |
| 2026-02-16 12:00 |
03:31:20.23 |
+24:30:26.9 |
HIP 16305 |
15.42 |
| 2026-02-17 00:00 |
03:31:42.42 |
+24:30:57.2 |
HIP 16305 |
20.49 |
| 2026-02-17 12:00 |
03:32:04.79 |
+24:31:28.2 |
HIP 16305 |
25.60 |
| 2026-02-18 00:00 |
03:32:27.32 |
+24:31:59.7 |
HIP 16639 |
25.41 |
| 2026-02-18 12:00 |
03:32:50.03 |
+24:32:31.7 |
HIP 16639 |
21.21 |
| 2026-02-19 00:00 |
03:33:12.91 |
+24:33:04.3 |
HIP 16639 |
17.52 |
| 2026-02-19 12:00 |
03:33:35.95 |
+24:33:37.5 |
HIP 16664 |
12.88 |
| 2026-02-20 00:00 |
03:33:59.16 |
+24:34:11.2 |
HIP 16664 |
8.88 |
| 2026-02-20 12:00 |
03:34:22.54 |
+24:34:45.4 |
HIP 16664 |
6.95 |
| 2026-02-21 00:00 |
03:34:46.08 |
+24:35:20.1 |
HIP 16664 |
8.68 |
| 2026-02-21 12:00 |
03:35:09.78 |
+24:35:55.4 |
HIP 16664 |
12.70 |
| 2026-02-22 00:00 |
03:35:33.65 |
+24:36:31.2 |
HIP 16664 |
17.53 |
| 2026-02-22 12:00 |
03:35:57.67 |
+24:37:07.4 |
HIP 16664 |
22.68 |
| 2026-02-23 00:00 |
03:36:21.85 |
+24:37:44.2 |
HIP 16664 |
28.00 |
| 2026-02-23 12:00 |
03:36:46.20 |
+24:38:21.4 |
HIP 16996 |
25.03 |
| 2026-02-24 00:00 |
03:37:10.69 |
+24:38:59.2 |
HIP 16996 |
19.58 |