메타데이터
| 항목 |
값 |
| Designation |
C/2005 E2 (McNaught) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2006-02-23T11:21:44.352000Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:47Z |
| Obs used |
1317 |
| NEO |
- |
| M1 |
9.200 |
| K1 |
7.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2006-05-09.0000000 |
| e |
1.00013891 |
| q (au) |
1.519579 |
| a (au) |
-10939.545227 |
| i (deg) |
16.988338 |
| Ω (om, deg) |
347.847398 |
| ω (w, deg) |
39.966443 |
| M (ma, deg) |
0.000064 |
밝기
산란 + 전체 선형
$$
M_a = (8.499 + 2.796\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
8.499 |
| n |
2.796 |
| gf |
0.997 |
| gb |
-0.504 |
| k |
1.000 |
| 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 |
| 2005-03-12 |
2006-02-23 |
-0.0277 |
-0.832 |
| 2006-02-23 |
2006-05-02 |
-34.1611 |
+5.629 |
| 2006-05-02 |
2006-10-31 |
+10.7800 |
-5.797 |
| 2006-10-31 |
2007-03-17 |
-2.8237 |
+2.023 |
| 2007-03-17 |
2008-03-02 |
+3.2324 |
-2.351 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
12:06:06.27 |
-06:19:50.2 |
HIP 59104 |
22.25 |
| 2026-05-12 12:00 |
12:06:04.60 |
-06:19:36.7 |
HIP 59104 |
22.41 |
| 2026-05-13 00:00 |
12:06:02.94 |
-06:19:23.4 |
HIP 59104 |
22.59 |
| 2026-05-13 12:00 |
12:06:01.31 |
-06:19:10.1 |
HIP 59104 |
22.76 |
| 2026-05-14 00:00 |
12:05:59.69 |
-06:18:57.0 |
HIP 59104 |
22.95 |
| 2026-05-14 12:00 |
12:05:58.09 |
-06:18:43.9 |
HIP 59104 |
23.14 |
| 2026-05-15 00:00 |
12:05:56.51 |
-06:18:31.0 |
HIP 59104 |
23.33 |
| 2026-05-15 12:00 |
12:05:54.95 |
-06:18:18.1 |
HIP 59104 |
23.52 |
| 2026-05-16 00:00 |
12:05:53.41 |
-06:18:05.4 |
HIP 59104 |
23.72 |
| 2026-05-16 12:00 |
12:05:51.89 |
-06:17:52.7 |
HIP 59104 |
23.93 |
| 2026-05-17 00:00 |
12:05:50.39 |
-06:17:40.2 |
HIP 59104 |
24.13 |
| 2026-05-17 12:00 |
12:05:48.90 |
-06:17:27.7 |
HIP 59104 |
24.34 |
| 2026-05-18 00:00 |
12:05:47.44 |
-06:17:15.4 |
HIP 59104 |
24.55 |
| 2026-05-18 12:00 |
12:05:45.99 |
-06:17:03.2 |
HIP 59104 |
24.77 |
| 2026-05-19 00:00 |
12:05:44.57 |
-06:16:51.1 |
HIP 59104 |
24.98 |
| 2026-05-19 12:00 |
12:05:43.16 |
-06:16:39.0 |
HIP 59104 |
25.20 |
| 2026-05-20 00:00 |
12:05:41.78 |
-06:16:27.1 |
HIP 59104 |
25.41 |
| 2026-05-20 12:00 |
12:05:40.41 |
-06:16:15.3 |
HIP 58981 |
25.54 |
| 2026-05-21 00:00 |
12:05:39.07 |
-06:16:03.6 |
HIP 58981 |
25.33 |
| 2026-05-21 12:00 |
12:05:37.74 |
-06:15:52.1 |
HIP 58981 |
25.12 |
| 2026-05-22 00:00 |
12:05:36.44 |
-06:15:40.6 |
HIP 58981 |
24.93 |
| 2026-05-22 12:00 |
12:05:35.15 |
-06:15:29.2 |
HIP 58981 |
24.73 |
| 2026-05-23 00:00 |
12:05:33.89 |
-06:15:18.0 |
HIP 58981 |
24.55 |
| 2026-05-23 12:00 |
12:05:32.65 |
-06:15:06.9 |
HIP 58981 |
24.37 |
| 2026-05-24 00:00 |
12:05:31.42 |
-06:14:55.9 |
HIP 58981 |
24.19 |
| 2026-05-24 12:00 |
12:05:30.22 |
-06:14:45.0 |
HIP 58981 |
24.03 |
| 2026-05-25 00:00 |
12:05:29.04 |
-06:14:34.2 |
HIP 58981 |
23.86 |
| 2026-05-25 12:00 |
12:05:27.88 |
-06:14:23.6 |
HIP 58981 |
23.71 |
| 2026-05-26 00:00 |
12:05:26.74 |
-06:14:13.0 |
HIP 58981 |
23.55 |
| 2026-05-26 12:00 |
12:05:25.62 |
-06:14:02.6 |
HIP 58981 |
23.41 |
| 2026-05-27 00:00 |
12:05:24.52 |
-06:13:52.3 |
HIP 58981 |
23.27 |
| 2026-05-27 12:00 |
12:05:23.44 |
-06:13:42.1 |
HIP 58981 |
23.13 |
| 2026-05-28 00:00 |
12:05:22.38 |
-06:13:32.0 |
HIP 58981 |
23.00 |
| 2026-05-28 12:00 |
12:05:21.34 |
-06:13:22.1 |
HIP 58981 |
22.87 |
| 2026-05-29 00:00 |
12:05:20.33 |
-06:13:12.3 |
HIP 58981 |
22.75 |
| 2026-05-29 12:00 |
12:05:19.34 |
-06:13:02.6 |
HIP 58981 |
22.63 |
| 2026-05-30 00:00 |
12:05:18.36 |
-06:12:53.0 |
HIP 58981 |
22.52 |
| 2026-05-30 12:00 |
12:05:17.41 |
-06:12:43.5 |
HIP 58981 |
22.41 |
| 2026-05-31 00:00 |
12:05:16.48 |
-06:12:34.2 |
HIP 58981 |
22.30 |
| 2026-05-31 12:00 |
12:05:15.57 |
-06:12:25.0 |
HIP 58981 |
22.20 |
| 2026-06-01 00:00 |
12:05:14.68 |
-06:12:15.9 |
HIP 58981 |
22.10 |
| 2026-06-01 12:00 |
12:05:13.82 |
-06:12:07.0 |
HIP 58981 |
22.01 |
| 2026-06-02 00:00 |
12:05:12.97 |
-06:11:58.2 |
HIP 58981 |
21.91 |