메타데이터
| 항목 |
값 |
| Designation |
C/2007 K5 (Lovejoy) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2007-05-01T23:02:06.720000Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:09Z |
| Obs used |
48 |
| NEO |
- |
| M1 |
12.000 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2007-06-15.0000000 |
| e |
0.97669348 |
| q (au) |
1.149171 |
| a (au) |
49.306854 |
| i (deg) |
64.883215 |
| Ω (om, deg) |
193.738734 |
| ω (w, deg) |
255.585000 |
| M (ma, deg) |
0.125370 |
밝기
산란 + 전체 선형
$$
M_a = (13.220 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
13.220 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
16:09:56.26 |
+32:00:48.2 |
HIP 79289 |
12.58 |
| 2026-03-26 12:00 |
16:09:54.43 |
+32:01:27.3 |
HIP 79289 |
13.02 |
| 2026-03-27 00:00 |
16:09:52.57 |
+32:02:06.2 |
HIP 79289 |
13.48 |
| 2026-03-27 12:00 |
16:09:50.68 |
+32:02:44.9 |
HIP 79289 |
13.98 |
| 2026-03-28 00:00 |
16:09:48.76 |
+32:03:23.5 |
HIP 79289 |
14.51 |
| 2026-03-28 12:00 |
16:09:46.82 |
+32:04:02.0 |
HIP 79289 |
15.06 |
| 2026-03-29 00:00 |
16:09:44.84 |
+32:04:40.4 |
HIP 79289 |
15.64 |
| 2026-03-29 12:00 |
16:09:42.84 |
+32:05:18.5 |
HIP 79289 |
16.23 |
| 2026-03-30 00:00 |
16:09:40.80 |
+32:05:56.6 |
HIP 79289 |
16.85 |
| 2026-03-30 12:00 |
16:09:38.74 |
+32:06:34.4 |
HIP 79289 |
17.48 |
| 2026-03-31 00:00 |
16:09:36.65 |
+32:07:12.1 |
HIP 79289 |
18.13 |
| 2026-03-31 12:00 |
16:09:34.53 |
+32:07:49.7 |
HIP 79289 |
18.79 |
| 2026-04-01 00:00 |
16:09:32.39 |
+32:08:27.0 |
HIP 79289 |
19.46 |
| 2026-04-01 12:00 |
16:09:30.21 |
+32:09:04.3 |
HIP 79289 |
20.14 |
| 2026-04-02 00:00 |
16:09:28.01 |
+32:09:41.3 |
HIP 79289 |
20.83 |
| 2026-04-02 12:00 |
16:09:25.78 |
+32:10:18.2 |
HIP 79289 |
21.53 |
| 2026-04-03 00:00 |
16:09:23.53 |
+32:10:54.9 |
HIP 79289 |
22.24 |
| 2026-04-03 12:00 |
16:09:21.24 |
+32:11:31.4 |
HIP 79289 |
22.96 |
| 2026-04-04 00:00 |
16:09:18.93 |
+32:12:07.7 |
HIP 79289 |
23.69 |
| 2026-04-04 12:00 |
16:09:16.60 |
+32:12:43.8 |
HIP 79289 |
24.42 |
| 2026-04-05 00:00 |
16:09:14.23 |
+32:13:19.8 |
HIP 79289 |
25.16 |
| 2026-04-05 12:00 |
16:09:11.84 |
+32:13:55.6 |
HIP 79289 |
25.90 |
| 2026-04-06 00:00 |
16:09:09.43 |
+32:14:31.2 |
HIP 79289 |
26.65 |
| 2026-04-06 12:00 |
16:09:06.99 |
+32:15:06.6 |
HIP 78959 |
26.15 |
| 2026-04-07 00:00 |
16:09:04.52 |
+32:15:41.8 |
HIP 78959 |
25.48 |
| 2026-04-07 12:00 |
16:09:02.02 |
+32:16:16.7 |
HIP 78959 |
24.81 |
| 2026-04-08 00:00 |
16:08:59.50 |
+32:16:51.5 |
HIP 78959 |
24.15 |
| 2026-04-08 12:00 |
16:08:56.96 |
+32:17:26.1 |
HIP 78959 |
23.49 |
| 2026-04-09 00:00 |
16:08:54.39 |
+32:18:00.5 |
HIP 78959 |
22.83 |
| 2026-04-09 12:00 |
16:08:51.80 |
+32:18:34.7 |
HIP 78959 |
22.18 |
| 2026-04-10 00:00 |
16:08:49.18 |
+32:19:08.6 |
HIP 78959 |
21.54 |
| 2026-04-10 12:00 |
16:08:46.53 |
+32:19:42.4 |
HIP 78959 |
20.89 |
| 2026-04-11 00:00 |
16:08:43.87 |
+32:20:15.9 |
HIP 78959 |
20.26 |
| 2026-04-11 12:00 |
16:08:41.17 |
+32:20:49.2 |
HIP 78959 |
19.63 |
| 2026-04-12 00:00 |
16:08:38.46 |
+32:21:22.3 |
HIP 78959 |
19.01 |
| 2026-04-12 12:00 |
16:08:35.72 |
+32:21:55.1 |
HIP 78959 |
18.40 |
| 2026-04-13 00:00 |
16:08:32.96 |
+32:22:27.7 |
HIP 78959 |
17.80 |
| 2026-04-13 12:00 |
16:08:30.17 |
+32:23:00.1 |
HIP 78959 |
17.21 |
| 2026-04-14 00:00 |
16:08:27.36 |
+32:23:32.3 |
HIP 78959 |
16.63 |
| 2026-04-14 12:00 |
16:08:24.53 |
+32:24:04.2 |
HIP 78959 |
16.07 |
| 2026-04-15 00:00 |
16:08:21.67 |
+32:24:35.9 |
HIP 78959 |
15.52 |
| 2026-04-15 12:00 |
16:08:18.80 |
+32:25:07.3 |
HIP 78959 |
14.99 |
| 2026-04-16 00:00 |
16:08:15.90 |
+32:25:38.5 |
HIP 78959 |
14.48 |