메타데이터
| 항목 |
값 |
| Designation |
C/2009 T1 (McNaught) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2009-10-08T06:04:38.959680Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:34Z |
| Obs used |
141 |
| NEO |
- |
| M1 |
8.100 |
| K1 |
7.500 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2010-04-02.0000000 |
| e |
0.99830743 |
| q (au) |
6.220409 |
| a (au) |
3675.119595 |
| i (deg) |
89.893932 |
| Ω (om, deg) |
54.407386 |
| ω (w, deg) |
282.529051 |
| M (ma, deg) |
0.000777 |
밝기
산란 + 전체 선형
$$
M_a = (1.547 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
1.547 |
| n |
6.000 |
| gf |
0.980 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
9.901 |
| 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 |
01:35:32.79 |
+64:00:12.7 |
HIP 7224 |
17.07 |
| 2026-03-26 12:00 |
01:35:39.67 |
+64:00:12.7 |
HIP 7224 |
17.78 |
| 2026-03-27 00:00 |
01:35:46.57 |
+64:00:13.2 |
HIP 7224 |
18.50 |
| 2026-03-27 12:00 |
01:35:53.49 |
+64:00:14.0 |
HIP 7224 |
19.22 |
| 2026-03-28 00:00 |
01:36:00.43 |
+64:00:15.2 |
HIP 7224 |
19.94 |
| 2026-03-28 12:00 |
01:36:07.38 |
+64:00:16.7 |
HIP 7224 |
20.66 |
| 2026-03-29 00:00 |
01:36:14.36 |
+64:00:18.7 |
HIP 7224 |
21.39 |
| 2026-03-29 12:00 |
01:36:21.36 |
+64:00:21.0 |
HIP 7224 |
22.12 |
| 2026-03-30 00:00 |
01:36:28.37 |
+64:00:23.8 |
HIP 7224 |
22.86 |
| 2026-03-30 12:00 |
01:36:35.40 |
+64:00:26.9 |
HIP 7670 |
22.66 |
| 2026-03-31 00:00 |
01:36:42.45 |
+64:00:30.3 |
HIP 7670 |
22.21 |
| 2026-03-31 12:00 |
01:36:49.51 |
+64:00:34.2 |
HIP 7670 |
21.80 |
| 2026-04-01 00:00 |
01:36:56.60 |
+64:00:38.4 |
HIP 7670 |
21.40 |
| 2026-04-01 12:00 |
01:37:03.69 |
+64:00:43.0 |
HIP 7670 |
21.03 |
| 2026-04-02 00:00 |
01:37:10.81 |
+64:00:48.0 |
HIP 7670 |
20.69 |
| 2026-04-02 12:00 |
01:37:17.93 |
+64:00:53.4 |
HIP 7670 |
20.38 |
| 2026-04-03 00:00 |
01:37:25.07 |
+64:00:59.1 |
HIP 7670 |
20.10 |
| 2026-04-03 12:00 |
01:37:32.23 |
+64:01:05.2 |
HIP 7670 |
19.86 |
| 2026-04-04 00:00 |
01:37:39.40 |
+64:01:11.7 |
HIP 7670 |
19.64 |
| 2026-04-04 12:00 |
01:37:46.58 |
+64:01:18.6 |
HIP 7811 |
19.44 |
| 2026-04-05 00:00 |
01:37:53.78 |
+64:01:25.8 |
HIP 7811 |
18.67 |
| 2026-04-05 12:00 |
01:38:00.99 |
+64:01:33.5 |
HIP 7811 |
17.90 |
| 2026-04-06 00:00 |
01:38:08.21 |
+64:01:41.5 |
HIP 7811 |
17.13 |
| 2026-04-06 12:00 |
01:38:15.44 |
+64:01:49.8 |
HIP 7811 |
16.35 |
| 2026-04-07 00:00 |
01:38:22.68 |
+64:01:58.5 |
HIP 7811 |
15.58 |
| 2026-04-07 12:00 |
01:38:29.93 |
+64:02:07.7 |
HIP 7811 |
14.80 |
| 2026-04-08 00:00 |
01:38:37.20 |
+64:02:17.1 |
HIP 7811 |
14.02 |
| 2026-04-08 12:00 |
01:38:44.47 |
+64:02:27.0 |
HIP 7811 |
13.25 |
| 2026-04-09 00:00 |
01:38:51.75 |
+64:02:37.2 |
HIP 7811 |
12.47 |
| 2026-04-09 12:00 |
01:38:59.04 |
+64:02:47.8 |
HIP 7811 |
11.70 |
| 2026-04-10 00:00 |
01:39:06.34 |
+64:02:58.8 |
HIP 7811 |
10.92 |
| 2026-04-10 12:00 |
01:39:13.65 |
+64:03:10.1 |
HIP 7811 |
10.15 |
| 2026-04-11 00:00 |
01:39:20.96 |
+64:03:21.8 |
HIP 7811 |
9.39 |
| 2026-04-11 12:00 |
01:39:28.28 |
+64:03:33.9 |
HIP 7811 |
8.63 |
| 2026-04-12 00:00 |
01:39:35.61 |
+64:03:46.3 |
HIP 7811 |
7.88 |
| 2026-04-12 12:00 |
01:39:42.94 |
+64:03:59.1 |
HIP 7811 |
7.14 |
| 2026-04-13 00:00 |
01:39:50.28 |
+64:04:12.2 |
HIP 7811 |
6.42 |
| 2026-04-13 12:00 |
01:39:57.62 |
+64:04:25.8 |
HIP 7811 |
5.72 |
| 2026-04-14 00:00 |
01:40:04.97 |
+64:04:39.7 |
HIP 7811 |
5.06 |
| 2026-04-14 12:00 |
01:40:12.32 |
+64:04:53.9 |
HIP 7811 |
4.45 |
| 2026-04-15 00:00 |
01:40:19.68 |
+64:05:08.6 |
HIP 7811 |
3.93 |
| 2026-04-15 12:00 |
01:40:27.04 |
+64:05:23.5 |
HIP 7811 |
3.51 |
| 2026-04-16 00:00 |
01:40:34.40 |
+64:05:38.9 |
HIP 7811 |
3.27 |