メタデータ
| 項目 |
値 |
| Designation |
C/2026 A3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2027-09-28T08:05:05.127360Z |
| Orbit solution date (soln_date, UTC) |
2026-03-31T09:12:02Z |
| Obs used |
62 |
| NEO |
- |
| M1 |
7.200 |
| K1 |
12.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2026-01-13T10:06:52.934400Z |
| Discovery magnitude (MPC) |
21.49 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) |
2026-02-23.0000000 |
| e |
1.00104942 |
| q (au) |
4.824138 |
| a (au) |
-4596.945251 |
| i (deg) |
157.375369 |
| Ω (om, deg) |
306.995043 |
| ω (w, deg) |
238.621469 |
| M (ma, deg) |
-0.001842 |
等級
散乱 + 全体線形
$$
M_a = (3.764 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
3.764 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
08:07:25.92 |
+20:34:09.4 |
HIP 39711 |
20.17 |
| 2026-03-26 12:00 |
08:07:06.06 |
+20:34:10.2 |
HIP 39711 |
19.36 |
| 2026-03-27 00:00 |
08:06:46.39 |
+20:34:10.4 |
HIP 39624 |
19.40 |
| 2026-03-27 12:00 |
08:06:26.93 |
+20:34:10.0 |
HIP 39624 |
16.60 |
| 2026-03-28 00:00 |
08:06:07.68 |
+20:34:08.9 |
HIP 39624 |
14.72 |
| 2026-03-28 12:00 |
08:05:48.63 |
+20:34:07.2 |
HIP 39624 |
14.10 |
| 2026-03-29 00:00 |
08:05:29.78 |
+20:34:04.9 |
HIP 39624 |
14.85 |
| 2026-03-29 12:00 |
08:05:11.14 |
+20:34:02.0 |
HIP 39624 |
16.75 |
| 2026-03-30 00:00 |
08:04:52.71 |
+20:33:58.4 |
HIP 39624 |
19.43 |
| 2026-03-30 12:00 |
08:04:34.48 |
+20:33:54.3 |
HIP 39428 |
19.61 |
| 2026-03-31 00:00 |
08:04:16.45 |
+20:33:49.5 |
HIP 39428 |
16.76 |
| 2026-03-31 12:00 |
08:03:58.63 |
+20:33:44.2 |
HIP 39428 |
14.60 |
| 2026-04-01 00:00 |
08:03:41.02 |
+20:33:38.2 |
HIP 39428 |
13.42 |
| 2026-04-01 12:00 |
08:03:23.61 |
+20:33:31.7 |
HIP 39428 |
13.44 |
| 2026-04-02 00:00 |
08:03:06.41 |
+20:33:24.6 |
HIP 39428 |
14.62 |
| 2026-04-02 12:00 |
08:02:49.41 |
+20:33:16.8 |
HIP 39428 |
16.67 |
| 2026-04-03 00:00 |
08:02:32.61 |
+20:33:08.6 |
HIP 39260 |
13.36 |
| 2026-04-03 12:00 |
08:02:16.03 |
+20:32:59.7 |
HIP 39260 |
10.01 |
| 2026-04-04 00:00 |
08:01:59.65 |
+20:32:50.3 |
HIP 39260 |
7.24 |
| 2026-04-04 12:00 |
08:01:43.47 |
+20:32:40.3 |
HIP 39260 |
5.84 |
| 2026-04-05 00:00 |
08:01:27.50 |
+20:32:29.7 |
HIP 39260 |
6.64 |
| 2026-04-05 12:00 |
08:01:11.73 |
+20:32:18.6 |
HIP 39260 |
9.02 |
| 2026-04-06 00:00 |
08:00:56.17 |
+20:32:07.0 |
HIP 39260 |
12.03 |
| 2026-04-06 12:00 |
08:00:40.81 |
+20:31:54.8 |
HIP 39260 |
15.28 |
| 2026-04-07 00:00 |
08:00:25.65 |
+20:31:42.0 |
HIP 39260 |
18.61 |
| 2026-04-07 12:00 |
08:00:10.70 |
+20:31:28.7 |
HIP 39064 |
21.08 |
| 2026-04-08 00:00 |
07:59:55.96 |
+20:31:14.9 |
HIP 39064 |
20.14 |
| 2026-04-08 12:00 |
07:59:41.42 |
+20:31:00.6 |
HIP 39064 |
19.78 |
| 2026-04-09 00:00 |
07:59:27.08 |
+20:30:45.7 |
HIP 39064 |
20.01 |
| 2026-04-09 12:00 |
07:59:12.94 |
+20:30:30.3 |
HIP 39064 |
20.79 |
| 2026-04-10 00:00 |
07:58:59.01 |
+20:30:14.4 |
HIP 39064 |
22.03 |
| 2026-04-10 12:00 |
07:58:45.28 |
+20:29:58.0 |
HIP 39064 |
23.65 |
| 2026-04-11 00:00 |
07:58:31.75 |
+20:29:41.0 |
HIP 39064 |
25.55 |
| 2026-04-11 12:00 |
07:58:18.43 |
+20:29:23.6 |
HIP 39064 |
27.67 |
| 2026-04-12 00:00 |
07:58:05.30 |
+20:29:05.6 |
HIP 39064 |
29.94 |
| 2026-04-12 12:00 |
07:57:52.38 |
+20:28:47.2 |
HIP 38777 |
30.48 |
| 2026-04-13 00:00 |
07:57:39.66 |
+20:28:28.2 |
HIP 38777 |
28.55 |
| 2026-04-13 12:00 |
07:57:27.13 |
+20:28:08.8 |
HIP 38777 |
26.86 |
| 2026-04-14 00:00 |
07:57:14.81 |
+20:27:48.9 |
HIP 38777 |
25.43 |
| 2026-04-14 12:00 |
07:57:02.69 |
+20:27:28.4 |
HIP 38777 |
24.29 |
| 2026-04-15 00:00 |
07:56:50.76 |
+20:27:07.5 |
HIP 38777 |
23.46 |
| 2026-04-15 12:00 |
07:56:39.04 |
+20:26:46.2 |
HIP 38777 |
22.98 |
| 2026-04-16 00:00 |
07:56:27.51 |
+20:26:24.3 |
HIP 38777 |
22.83 |