메타데이터
| 항목 |
값 |
| Designation |
C/2007 T1 (McNaught) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2007-12-12T12:43:02.167680Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:12Z |
| Obs used |
321 |
| NEO |
- |
| M1 |
11.100 |
| K1 |
15.750 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2007-12-03.0000000 |
| e |
0.99975973 |
| q (au) |
0.968503 |
| a (au) |
4030.976593 |
| i (deg) |
117.642445 |
| Ω (om, deg) |
111.433284 |
| ω (w, deg) |
233.755132 |
| M (ma, deg) |
359.999963 |
밝기
산란 + 전체 선형
$$
M_a = (10.423 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
10.423 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.980 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2007-10-09 |
2007-11-17 |
+26.4957 |
-3.984 |
| 2007-12-28 |
2008-03-01 |
+0.7702 |
-2.913 |
| 2008-03-01 |
2008-04-10 |
+33.3065 |
-10.740 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
06:14:35.81 |
+53:39:39.4 |
HIP 29795 |
19.15 |
| 2026-06-01 12:00 |
06:14:40.34 |
+53:39:31.1 |
HIP 29795 |
18.51 |
| 2026-06-02 00:00 |
06:14:44.89 |
+53:39:22.9 |
HIP 29795 |
17.88 |
| 2026-06-02 12:00 |
06:14:49.45 |
+53:39:14.9 |
HIP 29795 |
17.25 |
| 2026-06-03 00:00 |
06:14:54.03 |
+53:39:07.1 |
HIP 29795 |
16.63 |
| 2026-06-03 12:00 |
06:14:58.62 |
+53:38:59.4 |
HIP 29795 |
16.01 |
| 2026-06-04 00:00 |
06:15:03.22 |
+53:38:51.8 |
HIP 29795 |
15.40 |
| 2026-06-04 12:00 |
06:15:07.84 |
+53:38:44.5 |
HIP 29795 |
14.79 |
| 2026-06-05 00:00 |
06:15:12.47 |
+53:38:37.3 |
HIP 29795 |
14.20 |
| 2026-06-05 12:00 |
06:15:17.11 |
+53:38:30.3 |
HIP 29795 |
13.61 |
| 2026-06-06 00:00 |
06:15:21.77 |
+53:38:23.4 |
HIP 29795 |
13.04 |
| 2026-06-06 12:00 |
06:15:26.44 |
+53:38:16.7 |
HIP 29795 |
12.48 |
| 2026-06-07 00:00 |
06:15:31.12 |
+53:38:10.2 |
HIP 29795 |
11.94 |
| 2026-06-07 12:00 |
06:15:35.81 |
+53:38:03.9 |
HIP 29795 |
11.41 |
| 2026-06-08 00:00 |
06:15:40.51 |
+53:37:57.7 |
HIP 29795 |
10.91 |
| 2026-06-08 12:00 |
06:15:45.23 |
+53:37:51.7 |
HIP 29795 |
10.43 |
| 2026-06-09 00:00 |
06:15:49.95 |
+53:37:45.8 |
HIP 29795 |
9.98 |
| 2026-06-09 12:00 |
06:15:54.69 |
+53:37:40.1 |
HIP 29795 |
9.57 |
| 2026-06-10 00:00 |
06:15:59.44 |
+53:37:34.6 |
HIP 29795 |
9.19 |
| 2026-06-10 12:00 |
06:16:04.19 |
+53:37:29.3 |
HIP 29795 |
8.86 |
| 2026-06-11 00:00 |
06:16:08.96 |
+53:37:24.2 |
HIP 29795 |
8.57 |
| 2026-06-11 12:00 |
06:16:13.73 |
+53:37:19.2 |
HIP 29795 |
8.34 |
| 2026-06-12 00:00 |
06:16:18.52 |
+53:37:14.3 |
HIP 29795 |
8.16 |
| 2026-06-12 12:00 |
06:16:23.31 |
+53:37:09.7 |
HIP 29795 |
8.05 |
| 2026-06-13 00:00 |
06:16:28.11 |
+53:37:05.2 |
HIP 29795 |
8.01 |
| 2026-06-13 12:00 |
06:16:32.92 |
+53:37:00.9 |
HIP 29795 |
8.03 |
| 2026-06-14 00:00 |
06:16:37.74 |
+53:36:56.8 |
HIP 29795 |
8.12 |
| 2026-06-14 12:00 |
06:16:42.56 |
+53:36:52.9 |
HIP 29795 |
8.28 |
| 2026-06-15 00:00 |
06:16:47.39 |
+53:36:49.1 |
HIP 29795 |
8.49 |
| 2026-06-15 12:00 |
06:16:52.23 |
+53:36:45.5 |
HIP 29795 |
8.76 |
| 2026-06-16 00:00 |
06:16:57.07 |
+53:36:42.1 |
HIP 29795 |
9.09 |
| 2026-06-16 12:00 |
06:17:01.92 |
+53:36:38.8 |
HIP 29795 |
9.46 |
| 2026-06-17 00:00 |
06:17:06.78 |
+53:36:35.7 |
HIP 29935 |
9.77 |
| 2026-06-17 12:00 |
06:17:11.64 |
+53:36:32.8 |
HIP 29935 |
9.12 |
| 2026-06-18 00:00 |
06:17:16.50 |
+53:36:30.1 |
HIP 29935 |
8.49 |
| 2026-06-18 12:00 |
06:17:21.37 |
+53:36:27.6 |
HIP 29935 |
7.87 |
| 2026-06-19 00:00 |
06:17:26.25 |
+53:36:25.2 |
HIP 29935 |
7.27 |
| 2026-06-19 12:00 |
06:17:31.12 |
+53:36:23.0 |
HIP 29935 |
6.69 |
| 2026-06-20 00:00 |
06:17:36.01 |
+53:36:21.0 |
HIP 29935 |
6.14 |
| 2026-06-20 12:00 |
06:17:40.89 |
+53:36:19.1 |
HIP 29935 |
5.62 |
| 2026-06-21 00:00 |
06:17:45.78 |
+53:36:17.5 |
HIP 29935 |
5.16 |
| 2026-06-21 12:00 |
06:17:50.67 |
+53:36:16.0 |
HIP 29935 |
4.75 |
| 2026-06-22 00:00 |
06:17:55.56 |
+53:36:14.6 |
HIP 29935 |
4.43 |