메타데이터
| 항목 |
값 |
| Designation |
126P/IRAS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2023-07-05T08:31:56.219520Z |
| Orbit solution date (soln_date, UTC) |
2025-10-30T09:34:36Z |
| Obs used |
1717 |
| NEO |
- |
| M1 |
11.800 |
| K1 |
11.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2021-05-27.0000000 |
| e |
0.69627539 |
| q (au) |
1.713008 |
| a (au) |
5.640004 |
| i (deg) |
45.869371 |
| Ω (om, deg) |
357.862226 |
| ω (w, deg) |
356.523683 |
| M (ma, deg) |
303.387535 |
밝기
산란 + 전체 선형
$$
M_a = (10.785 + 5.260\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
10.785 |
| n |
5.260 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.992 |
| δ90 |
10.000 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
10:37:01.55 |
+39:09:37.3 |
HIP 52129 |
23.91 |
| 2026-03-26 12:00 |
10:36:44.50 |
+39:08:48.4 |
HIP 52034 |
26.90 |
| 2026-03-27 00:00 |
10:36:27.58 |
+39:07:57.9 |
HIP 52034 |
28.02 |
| 2026-03-27 12:00 |
10:36:10.79 |
+39:07:06.0 |
HIP 52034 |
29.45 |
| 2026-03-28 00:00 |
10:35:54.14 |
+39:06:12.6 |
HIP 52034 |
31.14 |
| 2026-03-28 12:00 |
10:35:37.63 |
+39:05:17.7 |
HIP 51651 |
29.92 |
| 2026-03-29 00:00 |
10:35:21.26 |
+39:04:21.3 |
HIP 51651 |
27.18 |
| 2026-03-29 12:00 |
10:35:05.02 |
+39:03:23.5 |
HIP 51651 |
24.60 |
| 2026-03-30 00:00 |
10:34:48.93 |
+39:02:24.3 |
HIP 51651 |
22.25 |
| 2026-03-30 12:00 |
10:34:32.99 |
+39:01:23.6 |
HIP 51651 |
20.19 |
| 2026-03-31 00:00 |
10:34:17.19 |
+39:00:21.5 |
HIP 51651 |
18.52 |
| 2026-03-31 12:00 |
10:34:01.53 |
+38:59:18.0 |
HIP 51651 |
17.33 |
| 2026-04-01 00:00 |
10:33:46.03 |
+38:58:13.1 |
HIP 51651 |
16.71 |
| 2026-04-01 12:00 |
10:33:30.67 |
+38:57:06.8 |
HIP 51651 |
16.72 |
| 2026-04-02 00:00 |
10:33:15.46 |
+38:55:59.2 |
HIP 51651 |
17.36 |
| 2026-04-02 12:00 |
10:33:00.40 |
+38:54:50.1 |
HIP 51651 |
18.53 |
| 2026-04-03 00:00 |
10:32:45.50 |
+38:53:39.7 |
HIP 51651 |
20.15 |
| 2026-04-03 12:00 |
10:32:30.75 |
+38:52:28.0 |
HIP 51497 |
19.21 |
| 2026-04-04 00:00 |
10:32:16.15 |
+38:51:14.9 |
HIP 51497 |
17.41 |
| 2026-04-04 12:00 |
10:32:01.71 |
+38:50:00.5 |
HIP 51497 |
16.04 |
| 2026-04-05 00:00 |
10:31:47.42 |
+38:48:44.7 |
HIP 51497 |
15.21 |
| 2026-04-05 12:00 |
10:31:33.30 |
+38:47:27.7 |
HIP 51497 |
15.00 |
| 2026-04-06 00:00 |
10:31:19.33 |
+38:46:09.4 |
HIP 51497 |
15.43 |
| 2026-04-06 12:00 |
10:31:05.52 |
+38:44:49.7 |
HIP 51420 |
15.69 |
| 2026-04-07 00:00 |
10:30:51.87 |
+38:43:28.8 |
HIP 51420 |
14.93 |
| 2026-04-07 12:00 |
10:30:38.39 |
+38:42:06.7 |
HIP 51382 |
12.33 |
| 2026-04-08 00:00 |
10:30:25.06 |
+38:40:43.2 |
HIP 51382 |
9.42 |
| 2026-04-08 12:00 |
10:30:11.91 |
+38:39:18.6 |
HIP 51382 |
6.57 |
| 2026-04-09 00:00 |
10:29:58.91 |
+38:37:52.6 |
HIP 51382 |
3.88 |
| 2026-04-09 12:00 |
10:29:46.08 |
+38:36:25.5 |
HIP 51382 |
2.03 |
| 2026-04-10 00:00 |
10:29:33.42 |
+38:34:57.2 |
HIP 51382 |
3.15 |
| 2026-04-10 12:00 |
10:29:20.92 |
+38:33:27.6 |
HIP 51382 |
5.68 |
| 2026-04-11 00:00 |
10:29:08.59 |
+38:31:56.9 |
HIP 51382 |
8.42 |
| 2026-04-11 12:00 |
10:28:56.44 |
+38:30:25.0 |
HIP 51382 |
11.20 |
| 2026-04-12 00:00 |
10:28:44.45 |
+38:28:51.9 |
HIP 51382 |
13.99 |
| 2026-04-12 12:00 |
10:28:32.63 |
+38:27:17.6 |
HIP 51382 |
16.77 |
| 2026-04-13 00:00 |
10:28:20.98 |
+38:25:42.3 |
HIP 51382 |
19.54 |
| 2026-04-13 12:00 |
10:28:09.50 |
+38:24:05.7 |
HIP 51382 |
22.30 |
| 2026-04-14 00:00 |
10:27:58.19 |
+38:22:28.1 |
HIP 51382 |
25.05 |
| 2026-04-14 12:00 |
10:27:47.06 |
+38:20:49.3 |
HIP 51382 |
27.78 |
| 2026-04-15 00:00 |
10:27:36.10 |
+38:19:09.4 |
HIP 51348 |
30.48 |
| 2026-04-15 12:00 |
10:27:25.31 |
+38:17:28.4 |
HIP 51348 |
30.75 |
| 2026-04-16 00:00 |
10:27:14.70 |
+38:15:46.4 |
HIP 51348 |
31.22 |