61P/Shajn-Schaldach
메타데이터
| 항목 |
값 |
| Designation |
61P/Shajn-Schaldach |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2022-10-23T19:34:06.749760Z |
| Orbit solution date (soln_date, UTC) |
2024-05-14T12:48:19Z |
| Obs used |
895 |
| NEO |
- |
| M1 |
11.900 |
| K1 |
13.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2022-09-30.0000000 |
| e |
0.42420483 |
| q (au) |
2.125862 |
| a (au) |
3.692046 |
| i (deg) |
6.000525 |
| Ω (om, deg) |
162.968506 |
| ω (w, deg) |
221.656974 |
| M (ma, deg) |
356.691277 |
밝기
산란 + 전체 선형
$$
M_a = (13.270 + 3.029\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
13.270 |
| n |
3.029 |
| gf |
0.905 |
| gb |
-0.772 |
| k |
0.996 |
| δ90 |
5.458 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2022-05-06 |
2022-10-23 |
-6.7763 |
+2.138 |
| 2022-10-23 |
2024-02-09 |
+10.6603 |
-3.646 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
13:53:16.23 |
-07:37:51.7 |
HIP 67718 |
19.67 |
| 2026-02-03 12:00 |
13:53:18.53 |
-07:37:30.4 |
HIP 67718 |
20.32 |
| 2026-02-04 00:00 |
13:53:20.64 |
-07:37:07.9 |
HIP 67718 |
20.96 |
| 2026-02-04 12:00 |
13:53:22.56 |
-07:36:44.3 |
HIP 67718 |
21.57 |
| 2026-02-05 00:00 |
13:53:24.29 |
-07:36:19.6 |
HIP 67718 |
22.17 |
| 2026-02-05 12:00 |
13:53:25.84 |
-07:35:53.8 |
HIP 67718 |
22.74 |
| 2026-02-06 00:00 |
13:53:27.19 |
-07:35:27.0 |
HIP 67718 |
23.30 |
| 2026-02-06 12:00 |
13:53:28.36 |
-07:34:59.0 |
HIP 67718 |
23.83 |
| 2026-02-07 00:00 |
13:53:29.33 |
-07:34:29.9 |
HIP 67718 |
24.35 |
| 2026-02-07 12:00 |
13:53:30.11 |
-07:33:59.8 |
HIP 67718 |
24.84 |
| 2026-02-08 00:00 |
13:53:30.70 |
-07:33:28.5 |
HIP 67718 |
25.32 |
| 2026-02-08 12:00 |
13:53:31.10 |
-07:32:56.1 |
HIP 67718 |
25.79 |
| 2026-02-09 00:00 |
13:53:31.31 |
-07:32:22.6 |
HIP 67718 |
26.24 |
| 2026-02-09 12:00 |
13:53:31.33 |
-07:31:48.1 |
HIP 67718 |
26.67 |
| 2026-02-10 00:00 |
13:53:31.15 |
-07:31:12.4 |
HIP 67718 |
27.10 |
| 2026-02-10 12:00 |
13:53:30.78 |
-07:30:35.6 |
HIP 67718 |
27.51 |
| 2026-02-11 00:00 |
13:53:30.21 |
-07:29:57.8 |
HIP 67718 |
27.92 |
| 2026-02-11 12:00 |
13:53:29.45 |
-07:29:18.8 |
HIP 67718 |
28.32 |
| 2026-02-12 00:00 |
13:53:28.50 |
-07:28:38.7 |
HIP 67718 |
28.72 |
| 2026-02-12 12:00 |
13:53:27.35 |
-07:27:57.6 |
HIP 67718 |
29.12 |
| 2026-02-13 00:00 |
13:53:26.01 |
-07:27:15.3 |
HIP 67718 |
29.52 |
| 2026-02-13 12:00 |
13:53:24.48 |
-07:26:32.0 |
HIP 67658 |
29.68 |
| 2026-02-14 00:00 |
13:53:22.75 |
-07:25:47.6 |
HIP 67658 |
28.92 |
| 2026-02-14 12:00 |
13:53:20.82 |
-07:25:02.0 |
HIP 67658 |
28.12 |
| 2026-02-15 00:00 |
13:53:18.70 |
-07:24:15.4 |
HIP 67658 |
27.27 |
| 2026-02-15 12:00 |
13:53:16.39 |
-07:23:27.7 |
HIP 67658 |
26.37 |
| 2026-02-16 00:00 |
13:53:13.88 |
-07:22:39.0 |
HIP 67658 |
25.43 |
| 2026-02-16 12:00 |
13:53:11.17 |
-07:21:49.1 |
HIP 67658 |
24.44 |
| 2026-02-17 00:00 |
13:53:08.27 |
-07:20:58.2 |
HIP 67658 |
23.42 |
| 2026-02-17 12:00 |
13:53:05.18 |
-07:20:06.2 |
HIP 67658 |
22.34 |
| 2026-02-18 00:00 |
13:53:01.89 |
-07:19:13.1 |
HIP 67658 |
21.23 |
| 2026-02-18 12:00 |
13:52:58.41 |
-07:18:19.0 |
HIP 67658 |
20.07 |
| 2026-02-19 00:00 |
13:52:54.73 |
-07:17:23.8 |
HIP 67658 |
18.88 |
| 2026-02-19 12:00 |
13:52:50.86 |
-07:16:27.5 |
HIP 67658 |
17.65 |
| 2026-02-20 00:00 |
13:52:46.79 |
-07:15:30.2 |
HIP 67658 |
16.38 |
| 2026-02-20 12:00 |
13:52:42.54 |
-07:14:31.9 |
HIP 67658 |
15.08 |
| 2026-02-21 00:00 |
13:52:38.09 |
-07:13:32.5 |
HIP 67658 |
13.77 |
| 2026-02-21 12:00 |
13:52:33.44 |
-07:12:32.1 |
HIP 67658 |
12.43 |
| 2026-02-22 00:00 |
13:52:28.61 |
-07:11:30.6 |
HIP 67658 |
11.10 |
| 2026-02-22 12:00 |
13:52:23.59 |
-07:10:28.1 |
HIP 67658 |
9.80 |
| 2026-02-23 00:00 |
13:52:18.37 |
-07:09:24.6 |
HIP 67658 |
8.56 |
| 2026-02-23 12:00 |
13:52:12.96 |
-07:08:20.1 |
HIP 67658 |
7.45 |
| 2026-02-24 00:00 |
13:52:07.37 |
-07:07:14.6 |
HIP 67658 |
6.57 |