メタデータ
| 項目 |
値 |
| Designation |
C/1952 M1 (Peltier) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1952-07-15T06:06:23.693760Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:10Z |
| Obs used |
30 |
| NEO |
- |
| M1 |
9.100 |
| K1 |
23.000 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1952-08-08.0000000 |
| e |
0.99975208 |
| q (au) |
1.201937 |
| a (au) |
4848.007632 |
| i (deg) |
45.552738 |
| Ω (om, deg) |
188.643743 |
| ω (w, deg) |
96.584082 |
| M (ma, deg) |
0.000069 |
等級
散乱 + 全体線形
$$
M_a = (8.443 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.443 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 1952-07-15 |
1952-11-20 |
+11.5410 |
-1.417 |
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) |
| 2026-05-12 00:00 |
05:58:24.96 |
-21:23:43.0 |
HIP 28284 |
9.25 |
| 2026-05-12 12:00 |
05:58:25.98 |
-21:23:35.0 |
HIP 28284 |
9.32 |
| 2026-05-13 00:00 |
05:58:27.01 |
-21:23:27.1 |
HIP 28284 |
9.39 |
| 2026-05-13 12:00 |
05:58:28.04 |
-21:23:19.3 |
HIP 28284 |
9.47 |
| 2026-05-14 00:00 |
05:58:29.08 |
-21:23:11.6 |
HIP 28284 |
9.56 |
| 2026-05-14 12:00 |
05:58:30.12 |
-21:23:03.9 |
HIP 28284 |
9.65 |
| 2026-05-15 00:00 |
05:58:31.17 |
-21:22:56.4 |
HIP 28284 |
9.75 |
| 2026-05-15 12:00 |
05:58:32.23 |
-21:22:48.9 |
HIP 28284 |
9.85 |
| 2026-05-16 00:00 |
05:58:33.29 |
-21:22:41.5 |
HIP 28284 |
9.96 |
| 2026-05-16 12:00 |
05:58:34.36 |
-21:22:34.2 |
HIP 28284 |
10.07 |
| 2026-05-17 00:00 |
05:58:35.44 |
-21:22:27.0 |
HIP 28284 |
10.19 |
| 2026-05-17 12:00 |
05:58:36.52 |
-21:22:19.9 |
HIP 28284 |
10.31 |
| 2026-05-18 00:00 |
05:58:37.61 |
-21:22:12.9 |
HIP 28284 |
10.44 |
| 2026-05-18 12:00 |
05:58:38.70 |
-21:22:06.0 |
HIP 28284 |
10.57 |
| 2026-05-19 00:00 |
05:58:39.80 |
-21:21:59.1 |
HIP 28284 |
10.70 |
| 2026-05-19 12:00 |
05:58:40.90 |
-21:21:52.4 |
HIP 28284 |
10.84 |
| 2026-05-20 00:00 |
05:58:42.01 |
-21:21:45.7 |
HIP 28284 |
10.99 |
| 2026-05-20 12:00 |
05:58:43.13 |
-21:21:39.1 |
HIP 28284 |
11.13 |
| 2026-05-21 00:00 |
05:58:44.25 |
-21:21:32.7 |
HIP 28284 |
11.29 |
| 2026-05-21 12:00 |
05:58:45.38 |
-21:21:26.3 |
HIP 28284 |
11.44 |
| 2026-05-22 00:00 |
05:58:46.51 |
-21:21:20.0 |
HIP 28284 |
11.60 |
| 2026-05-22 12:00 |
05:58:47.65 |
-21:21:13.8 |
HIP 28284 |
11.76 |
| 2026-05-23 00:00 |
05:58:48.79 |
-21:21:07.7 |
HIP 28284 |
11.93 |
| 2026-05-23 12:00 |
05:58:49.94 |
-21:21:01.7 |
HIP 28284 |
12.10 |
| 2026-05-24 00:00 |
05:58:51.09 |
-21:20:55.8 |
HIP 28284 |
12.27 |
| 2026-05-24 12:00 |
05:58:52.24 |
-21:20:50.0 |
HIP 28284 |
12.44 |
| 2026-05-25 00:00 |
05:58:53.41 |
-21:20:44.3 |
HIP 28284 |
12.62 |
| 2026-05-25 12:00 |
05:58:54.57 |
-21:20:38.6 |
HIP 28284 |
12.80 |
| 2026-05-26 00:00 |
05:58:55.74 |
-21:20:33.1 |
HIP 28284 |
12.98 |
| 2026-05-26 12:00 |
05:58:56.92 |
-21:20:27.7 |
HIP 28284 |
13.17 |
| 2026-05-27 00:00 |
05:58:58.10 |
-21:20:22.4 |
HIP 28284 |
13.36 |
| 2026-05-27 12:00 |
05:58:59.28 |
-21:20:17.1 |
HIP 28284 |
13.55 |
| 2026-05-28 00:00 |
05:59:00.47 |
-21:20:12.0 |
HIP 28284 |
13.74 |
| 2026-05-28 12:00 |
05:59:01.66 |
-21:20:07.0 |
HIP 28284 |
13.94 |
| 2026-05-29 00:00 |
05:59:02.86 |
-21:20:02.0 |
HIP 28284 |
14.14 |
| 2026-05-29 12:00 |
05:59:04.06 |
-21:19:57.2 |
HIP 28407 |
13.98 |
| 2026-05-30 00:00 |
05:59:05.26 |
-21:19:52.4 |
HIP 28407 |
13.74 |
| 2026-05-30 12:00 |
05:59:06.47 |
-21:19:47.8 |
HIP 28407 |
13.51 |
| 2026-05-31 00:00 |
05:59:07.68 |
-21:19:43.2 |
HIP 28407 |
13.28 |
| 2026-05-31 12:00 |
05:59:08.90 |
-21:19:38.8 |
HIP 28407 |
13.05 |
| 2026-06-01 00:00 |
05:59:10.12 |
-21:19:34.4 |
HIP 28407 |
12.82 |
| 2026-06-01 12:00 |
05:59:11.34 |
-21:19:30.2 |
HIP 28407 |
12.59 |
| 2026-06-02 00:00 |
05:59:12.56 |
-21:19:26.0 |
HIP 28407 |
12.36 |