メタデータ
| 項目 |
値 |
| Designation |
472P/NEAT-LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2024-07-27T15:46:29.570880Z |
| Orbit solution date (soln_date, UTC) |
2026-03-07T14:43:41Z |
| Obs used |
1350 |
| NEO |
- |
| M1 |
6.500 |
| K1 |
14.000 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2023-09-09T02:13:12.604800Z |
| Discovery magnitude (MPC) |
21.70 G |
| Discovery observatory (MPC) |
Z84 · Calar Alto-Schmidt |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2018-04-29.0000000 |
| e |
0.55921342 |
| q (au) |
3.369110 |
| a (au) |
7.643404 |
| i (deg) |
10.900416 |
| Ω (om, deg) |
207.853697 |
| ω (w, deg) |
218.510075 |
| M (ma, deg) |
253.579745 |
等級
散乱 + 全体線形
$$
M_a = (5.633 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
5.633 |
| n |
6.000 |
| gf |
0.894 |
| gb |
-0.500 |
| k |
0.948 |
| δ90 |
1.227 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2023-09-05 |
2024-07-25 |
+47.4044 |
-24.438 |
| 2024-08-12 |
2025-04-29 |
-2.4708 |
+1.270 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
09:42:50.54 |
+02:57:29.0 |
HIP 47693 |
21.85 |
| 2026-03-26 12:00 |
09:42:43.52 |
+02:59:12.4 |
HIP 47693 |
24.16 |
| 2026-03-27 00:00 |
09:42:36.67 |
+03:00:55.2 |
HIP 47693 |
26.47 |
| 2026-03-27 12:00 |
09:42:29.98 |
+03:02:37.4 |
HIP 47693 |
28.77 |
| 2026-03-28 00:00 |
09:42:23.46 |
+03:04:18.9 |
HIP 47693 |
31.06 |
| 2026-03-28 12:00 |
09:42:17.12 |
+03:05:59.9 |
HIP 47693 |
33.32 |
| 2026-03-29 00:00 |
09:42:10.94 |
+03:07:40.2 |
HIP 47693 |
35.55 |
| 2026-03-29 12:00 |
09:42:04.93 |
+03:09:19.8 |
HIP 47411 |
36.36 |
| 2026-03-30 00:00 |
09:41:59.10 |
+03:10:58.8 |
HIP 47411 |
34.83 |
| 2026-03-30 12:00 |
09:41:53.43 |
+03:12:37.1 |
HIP 47411 |
33.42 |
| 2026-03-31 00:00 |
09:41:47.94 |
+03:14:14.7 |
HIP 47411 |
32.13 |
| 2026-03-31 12:00 |
09:41:42.62 |
+03:15:51.7 |
HIP 47411 |
30.98 |
| 2026-04-01 00:00 |
09:41:37.48 |
+03:17:27.9 |
HIP 47411 |
29.98 |
| 2026-04-01 12:00 |
09:41:32.50 |
+03:19:03.5 |
HIP 47411 |
29.12 |
| 2026-04-02 00:00 |
09:41:27.70 |
+03:20:38.3 |
HIP 47411 |
28.42 |
| 2026-04-02 12:00 |
09:41:23.08 |
+03:22:12.4 |
HIP 47411 |
27.88 |
| 2026-04-03 00:00 |
09:41:18.63 |
+03:23:45.8 |
HIP 47411 |
27.49 |
| 2026-04-03 12:00 |
09:41:14.35 |
+03:25:18.4 |
HIP 47411 |
27.27 |
| 2026-04-04 00:00 |
09:41:10.26 |
+03:26:50.3 |
HIP 47411 |
27.21 |
| 2026-04-04 12:00 |
09:41:06.33 |
+03:28:21.4 |
HIP 47411 |
27.30 |
| 2026-04-05 00:00 |
09:41:02.58 |
+03:29:51.8 |
HIP 47411 |
27.53 |
| 2026-04-05 12:00 |
09:40:59.01 |
+03:31:21.3 |
HIP 47411 |
27.90 |
| 2026-04-06 00:00 |
09:40:55.62 |
+03:32:50.1 |
HIP 47411 |
28.39 |
| 2026-04-06 12:00 |
09:40:52.40 |
+03:34:18.1 |
HIP 47411 |
28.98 |
| 2026-04-07 00:00 |
09:40:49.36 |
+03:35:45.4 |
HIP 47411 |
29.68 |
| 2026-04-07 12:00 |
09:40:46.49 |
+03:37:11.8 |
HIP 47411 |
30.46 |
| 2026-04-08 00:00 |
09:40:43.81 |
+03:38:37.4 |
HIP 47411 |
31.31 |
| 2026-04-08 12:00 |
09:40:41.30 |
+03:40:02.2 |
HIP 47411 |
32.23 |
| 2026-04-09 00:00 |
09:40:38.97 |
+03:41:26.1 |
HIP 47411 |
33.20 |
| 2026-04-09 12:00 |
09:40:36.81 |
+03:42:49.2 |
HIP 47411 |
34.22 |
| 2026-04-10 00:00 |
09:40:34.84 |
+03:44:11.5 |
HIP 47411 |
35.28 |
| 2026-04-10 12:00 |
09:40:33.04 |
+03:45:33.0 |
HIP 47415 |
34.00 |
| 2026-04-11 00:00 |
09:40:31.43 |
+03:46:53.5 |
HIP 47415 |
32.61 |
| 2026-04-11 12:00 |
09:40:29.99 |
+03:48:13.3 |
HIP 47415 |
31.24 |
| 2026-04-12 00:00 |
09:40:28.72 |
+03:49:32.1 |
HIP 47415 |
29.91 |
| 2026-04-12 12:00 |
09:40:27.64 |
+03:50:50.1 |
HIP 47415 |
28.61 |
| 2026-04-13 00:00 |
09:40:26.74 |
+03:52:07.2 |
HIP 47415 |
27.34 |
| 2026-04-13 12:00 |
09:40:26.01 |
+03:53:23.4 |
HIP 47415 |
26.11 |
| 2026-04-14 00:00 |
09:40:25.47 |
+03:54:38.7 |
HIP 47415 |
24.92 |
| 2026-04-14 12:00 |
09:40:25.10 |
+03:55:53.2 |
HIP 47415 |
23.77 |
| 2026-04-15 00:00 |
09:40:24.91 |
+03:57:06.7 |
HIP 47415 |
22.66 |
| 2026-04-15 12:00 |
09:40:24.90 |
+03:58:19.3 |
HIP 47415 |
21.60 |
| 2026-04-16 00:00 |
09:40:25.07 |
+03:59:31.0 |
HIP 47415 |
20.59 |