メタデータ
| 項目 |
値 |
| Designation |
C/2021 N3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2020-08-19T14:19:37.767360Z |
| Orbit solution date (soln_date, UTC) |
2022-12-28T10:18:08Z |
| Obs used |
77 |
| NEO |
- |
| M1 |
7.200 |
| K1 |
12.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2021-07-13T12:22:01.401600Z |
| Discovery magnitude (MPC) |
20.56 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2022-04-13.0000000 |
| e |
0.96427540 |
| q (au) |
5.711157 |
| a (au) |
159.866205 |
| i (deg) |
26.748126 |
| Ω (om, deg) |
337.494113 |
| ω (w, deg) |
304.695943 |
| M (ma, deg) |
0.293248 |
等級
散乱 + 全体線形
$$
M_a = (4.887 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
4.887 |
| n |
6.000 |
| gf |
0.872 |
| gb |
-0.960 |
| k |
1.000 |
| δ90 |
1.000 |
| 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) |
| 2026-03-26 00:00 |
00:43:16.26 |
+24:04:45.2 |
HIP 3428 |
12.95 |
| 2026-03-26 12:00 |
00:43:25.77 |
+24:05:44.4 |
HIP 3428 |
13.09 |
| 2026-03-27 00:00 |
00:43:35.29 |
+24:06:44.0 |
HIP 3428 |
13.66 |
| 2026-03-27 12:00 |
00:43:44.82 |
+24:07:43.9 |
HIP 3428 |
14.61 |
| 2026-03-28 00:00 |
00:43:54.34 |
+24:08:44.1 |
HIP 3428 |
15.87 |
| 2026-03-28 12:00 |
00:44:03.87 |
+24:09:44.6 |
HIP 3428 |
17.38 |
| 2026-03-29 00:00 |
00:44:13.40 |
+24:10:45.4 |
HIP 3428 |
19.07 |
| 2026-03-29 12:00 |
00:44:22.93 |
+24:11:46.5 |
HIP 3428 |
20.91 |
| 2026-03-30 00:00 |
00:44:32.47 |
+24:12:47.9 |
HIP 3428 |
22.85 |
| 2026-03-30 12:00 |
00:44:42.00 |
+24:13:49.5 |
HIP 3428 |
24.89 |
| 2026-03-31 00:00 |
00:44:51.54 |
+24:14:51.5 |
HIP 3428 |
26.98 |
| 2026-03-31 12:00 |
00:45:01.07 |
+24:15:53.7 |
HIP 3428 |
29.13 |
| 2026-04-01 00:00 |
00:45:10.61 |
+24:16:56.2 |
HIP 3693 |
29.59 |
| 2026-04-01 12:00 |
00:45:20.14 |
+24:17:59.0 |
HIP 3693 |
27.47 |
| 2026-04-02 00:00 |
00:45:29.67 |
+24:19:02.1 |
HIP 3693 |
25.41 |
| 2026-04-02 12:00 |
00:45:39.20 |
+24:20:05.4 |
HIP 3693 |
23.41 |
| 2026-04-03 00:00 |
00:45:48.73 |
+24:21:09.1 |
HIP 3693 |
21.50 |
| 2026-04-03 12:00 |
00:45:58.26 |
+24:22:13.0 |
HIP 3693 |
19.70 |
| 2026-04-04 00:00 |
00:46:07.78 |
+24:23:17.1 |
HIP 3693 |
18.06 |
| 2026-04-04 12:00 |
00:46:17.31 |
+24:24:21.5 |
HIP 3693 |
16.60 |
| 2026-04-05 00:00 |
00:46:26.82 |
+24:25:26.2 |
HIP 3693 |
15.40 |
| 2026-04-05 12:00 |
00:46:36.34 |
+24:26:31.1 |
HIP 3693 |
14.51 |
| 2026-04-06 00:00 |
00:46:45.85 |
+24:27:36.3 |
HIP 3693 |
13.99 |
| 2026-04-06 12:00 |
00:46:55.35 |
+24:28:41.8 |
HIP 3693 |
13.88 |
| 2026-04-07 00:00 |
00:47:04.85 |
+24:29:47.5 |
HIP 3693 |
14.20 |
| 2026-04-07 12:00 |
00:47:14.34 |
+24:30:53.4 |
HIP 3693 |
14.91 |
| 2026-04-08 00:00 |
00:47:23.83 |
+24:31:59.6 |
HIP 3693 |
15.97 |
| 2026-04-08 12:00 |
00:47:33.31 |
+24:33:06.1 |
HIP 3693 |
17.31 |
| 2026-04-09 00:00 |
00:47:42.78 |
+24:34:12.7 |
HIP 3693 |
18.87 |
| 2026-04-09 12:00 |
00:47:52.25 |
+24:35:19.7 |
HIP 3693 |
20.60 |
| 2026-04-10 00:00 |
00:48:01.71 |
+24:36:26.8 |
HIP 3806 |
19.97 |
| 2026-04-10 12:00 |
00:48:11.16 |
+24:37:34.2 |
HIP 3806 |
17.80 |
| 2026-04-11 00:00 |
00:48:20.60 |
+24:38:41.8 |
HIP 3806 |
15.70 |
| 2026-04-11 12:00 |
00:48:30.03 |
+24:39:49.7 |
HIP 3806 |
13.70 |
| 2026-04-12 00:00 |
00:48:39.46 |
+24:40:57.8 |
HIP 3806 |
11.86 |
| 2026-04-12 12:00 |
00:48:48.87 |
+24:42:06.1 |
HIP 3806 |
10.27 |
| 2026-04-13 00:00 |
00:48:58.27 |
+24:43:14.6 |
HIP 3806 |
9.04 |
| 2026-04-13 12:00 |
00:49:07.66 |
+24:44:23.3 |
HIP 3806 |
8.35 |
| 2026-04-14 00:00 |
00:49:17.04 |
+24:45:32.3 |
HIP 3806 |
8.32 |
| 2026-04-14 12:00 |
00:49:26.41 |
+24:46:41.4 |
HIP 3806 |
8.97 |
| 2026-04-15 00:00 |
00:49:35.77 |
+24:47:50.8 |
HIP 3806 |
10.16 |
| 2026-04-15 12:00 |
00:49:45.11 |
+24:49:00.4 |
HIP 3937 |
10.89 |
| 2026-04-16 00:00 |
00:49:54.44 |
+24:50:10.2 |
HIP 3937 |
8.85 |