C/2005 E2 (McNaught)
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 |
-34.5383 |
+5.700 |
| 2006-05-02 |
2006-10-31 |
+11.0123 |
-5.882 |
| 2006-10-31 |
2007-05-04 |
-3.7239 |
+2.576 |
| 2007-05-04 |
2008-03-02 |
+5.7859 |
-4.348 |
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 |
12:13:43.82 |
-07:06:40.3 |
HIP 59559 |
13.59 |
| 2026-02-03 12:00 |
12:13:42.12 |
-07:06:33.4 |
HIP 59559 |
13.16 |
| 2026-02-04 00:00 |
12:13:40.40 |
-07:06:26.4 |
HIP 59559 |
12.72 |
| 2026-02-04 12:00 |
12:13:38.67 |
-07:06:19.2 |
HIP 59559 |
12.27 |
| 2026-02-05 00:00 |
12:13:36.91 |
-07:06:11.9 |
HIP 59559 |
11.82 |
| 2026-02-05 12:00 |
12:13:35.14 |
-07:06:04.4 |
HIP 59559 |
11.36 |
| 2026-02-06 00:00 |
12:13:33.34 |
-07:05:56.8 |
HIP 59559 |
10.90 |
| 2026-02-06 12:00 |
12:13:31.53 |
-07:05:49.0 |
HIP 59559 |
10.43 |
| 2026-02-07 00:00 |
12:13:29.70 |
-07:05:41.1 |
HIP 59559 |
9.96 |
| 2026-02-07 12:00 |
12:13:27.86 |
-07:05:33.1 |
HIP 59559 |
9.48 |
| 2026-02-08 00:00 |
12:13:25.99 |
-07:05:24.9 |
HIP 59559 |
9.00 |
| 2026-02-08 12:00 |
12:13:24.11 |
-07:05:16.6 |
HIP 59559 |
8.52 |
| 2026-02-09 00:00 |
12:13:22.21 |
-07:05:08.1 |
HIP 59559 |
8.03 |
| 2026-02-09 12:00 |
12:13:20.29 |
-07:04:59.5 |
HIP 59559 |
7.53 |
| 2026-02-10 00:00 |
12:13:18.36 |
-07:04:50.8 |
HIP 59559 |
7.03 |
| 2026-02-10 12:00 |
12:13:16.40 |
-07:04:41.9 |
HIP 59559 |
6.52 |
| 2026-02-11 00:00 |
12:13:14.44 |
-07:04:32.9 |
HIP 59559 |
6.02 |
| 2026-02-11 12:00 |
12:13:12.45 |
-07:04:23.7 |
HIP 59559 |
5.50 |
| 2026-02-12 00:00 |
12:13:10.45 |
-07:04:14.4 |
HIP 59559 |
4.98 |
| 2026-02-12 12:00 |
12:13:08.43 |
-07:04:05.0 |
HIP 59559 |
4.46 |
| 2026-02-13 00:00 |
12:13:06.40 |
-07:03:55.5 |
HIP 59559 |
3.94 |
| 2026-02-13 12:00 |
12:13:04.35 |
-07:03:45.8 |
HIP 59559 |
3.41 |
| 2026-02-14 00:00 |
12:13:02.28 |
-07:03:36.0 |
HIP 59559 |
2.87 |
| 2026-02-14 12:00 |
12:13:00.20 |
-07:03:26.0 |
HIP 59559 |
2.34 |
| 2026-02-15 00:00 |
12:12:58.10 |
-07:03:15.9 |
HIP 59559 |
1.80 |
| 2026-02-15 12:00 |
12:12:55.99 |
-07:03:05.7 |
HIP 59559 |
1.28 |
| 2026-02-16 00:00 |
12:12:53.86 |
-07:02:55.4 |
HIP 59559 |
0.78 |
| 2026-02-16 12:00 |
12:12:51.71 |
-07:02:44.9 |
HIP 59559 |
0.45 |
| 2026-02-17 00:00 |
12:12:49.56 |
-07:02:34.3 |
HIP 59559 |
0.65 |
| 2026-02-17 12:00 |
12:12:47.38 |
-07:02:23.6 |
HIP 59559 |
1.13 |
| 2026-02-18 00:00 |
12:12:45.20 |
-07:02:12.7 |
HIP 59559 |
1.68 |
| 2026-02-18 12:00 |
12:12:43.00 |
-07:02:01.8 |
HIP 59559 |
2.24 |
| 2026-02-19 00:00 |
12:12:40.78 |
-07:01:50.7 |
HIP 59559 |
2.81 |
| 2026-02-19 12:00 |
12:12:38.55 |
-07:01:39.5 |
HIP 59559 |
3.38 |
| 2026-02-20 00:00 |
12:12:36.31 |
-07:01:28.1 |
HIP 59559 |
3.97 |
| 2026-02-20 12:00 |
12:12:34.05 |
-07:01:16.7 |
HIP 59559 |
4.56 |
| 2026-02-21 00:00 |
12:12:31.78 |
-07:01:05.1 |
HIP 59507 |
4.32 |
| 2026-02-21 12:00 |
12:12:29.50 |
-07:00:53.4 |
HIP 59507 |
3.73 |
| 2026-02-22 00:00 |
12:12:27.21 |
-07:00:41.6 |
HIP 59507 |
3.13 |
| 2026-02-22 12:00 |
12:12:24.90 |
-07:00:29.7 |
HIP 59507 |
2.53 |
| 2026-02-23 00:00 |
12:12:22.58 |
-07:00:17.7 |
HIP 59507 |
1.93 |
| 2026-02-23 12:00 |
12:12:20.25 |
-07:00:05.5 |
HIP 59507 |
1.34 |
| 2026-02-24 00:00 |
12:12:17.90 |
-06:59:53.3 |
HIP 59507 |
0.78 |