메타데이터
| 항목 |
값 |
| Designation |
C/2014 Q2 (Lovejoy) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2015-01-30T01:39:43.165440Z |
| Orbit solution date (soln_date, UTC) |
2026-03-07T14:42:53Z |
| Obs used |
7892 |
| NEO |
- |
| M1 |
9.800 |
| K1 |
4.750 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-03-30.0000000 |
| e |
0.99777385 |
| q (au) |
1.290358 |
| a (au) |
579.637230 |
| i (deg) |
80.301302 |
| Ω (om, deg) |
94.975059 |
| ω (w, deg) |
12.395262 |
| M (ma, deg) |
0.004162 |
밝기
산란 + 전체 선형
$$
M_a = (9.166 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
9.166 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
0.870 |
| δ90 |
1.000 |
| 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 |
| 2014-07-01 |
2015-01-30 |
+10.9131 |
-2.182 |
| 2015-01-30 |
2016-09-10 |
+4.9291 |
-3.119 |
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 |
18:14:44.15 |
-10:35:29.3 |
HIP 89377 |
7.41 |
| 2026-06-01 12:00 |
18:14:40.01 |
-10:35:29.0 |
HIP 89377 |
6.73 |
| 2026-06-02 00:00 |
18:14:35.84 |
-10:35:28.9 |
HIP 89377 |
6.14 |
| 2026-06-02 12:00 |
18:14:31.67 |
-10:35:28.8 |
HIP 89377 |
5.68 |
| 2026-06-03 00:00 |
18:14:27.48 |
-10:35:28.9 |
HIP 89377 |
5.36 |
| 2026-06-03 12:00 |
18:14:23.27 |
-10:35:29.1 |
HIP 89377 |
5.23 |
| 2026-06-04 00:00 |
18:14:19.06 |
-10:35:29.4 |
HIP 89377 |
5.31 |
| 2026-06-04 12:00 |
18:14:14.82 |
-10:35:29.9 |
HIP 89377 |
5.57 |
| 2026-06-05 00:00 |
18:14:10.58 |
-10:35:30.4 |
HIP 89377 |
6.01 |
| 2026-06-05 12:00 |
18:14:06.32 |
-10:35:31.1 |
HIP 89377 |
6.58 |
| 2026-06-06 00:00 |
18:14:02.05 |
-10:35:31.9 |
HIP 89377 |
7.27 |
| 2026-06-06 12:00 |
18:13:57.77 |
-10:35:32.8 |
HIP 89377 |
8.03 |
| 2026-06-07 00:00 |
18:13:53.47 |
-10:35:33.9 |
HIP 89377 |
8.85 |
| 2026-06-07 12:00 |
18:13:49.16 |
-10:35:35.0 |
HIP 89377 |
9.72 |
| 2026-06-08 00:00 |
18:13:44.84 |
-10:35:36.3 |
HIP 89377 |
10.63 |
| 2026-06-08 12:00 |
18:13:40.51 |
-10:35:37.7 |
HIP 89377 |
11.56 |
| 2026-06-09 00:00 |
18:13:36.17 |
-10:35:39.2 |
HIP 89377 |
12.52 |
| 2026-06-09 12:00 |
18:13:31.82 |
-10:35:40.9 |
HIP 89377 |
13.49 |
| 2026-06-10 00:00 |
18:13:27.46 |
-10:35:42.6 |
HIP 89377 |
14.48 |
| 2026-06-10 12:00 |
18:13:23.09 |
-10:35:44.5 |
HIP 89377 |
15.48 |
| 2026-06-11 00:00 |
18:13:18.71 |
-10:35:46.5 |
HIP 89218 |
15.56 |
| 2026-06-11 12:00 |
18:13:14.32 |
-10:35:48.7 |
HIP 89218 |
14.63 |
| 2026-06-12 00:00 |
18:13:09.92 |
-10:35:50.9 |
HIP 89218 |
13.72 |
| 2026-06-12 12:00 |
18:13:05.51 |
-10:35:53.3 |
HIP 89218 |
12.83 |
| 2026-06-13 00:00 |
18:13:01.10 |
-10:35:55.8 |
HIP 89218 |
11.98 |
| 2026-06-13 12:00 |
18:12:56.68 |
-10:35:58.4 |
HIP 89218 |
11.16 |
| 2026-06-14 00:00 |
18:12:52.25 |
-10:36:01.2 |
HIP 89218 |
10.38 |
| 2026-06-14 12:00 |
18:12:47.81 |
-10:36:04.0 |
HIP 89218 |
9.67 |
| 2026-06-15 00:00 |
18:12:43.37 |
-10:36:07.0 |
HIP 89218 |
9.03 |
| 2026-06-15 12:00 |
18:12:38.92 |
-10:36:10.2 |
HIP 89218 |
8.47 |
| 2026-06-16 00:00 |
18:12:34.47 |
-10:36:13.4 |
HIP 89218 |
8.03 |
| 2026-06-16 12:00 |
18:12:30.01 |
-10:36:16.8 |
HIP 89218 |
7.72 |
| 2026-06-17 00:00 |
18:12:25.54 |
-10:36:20.2 |
HIP 89218 |
7.55 |
| 2026-06-17 12:00 |
18:12:21.07 |
-10:36:23.9 |
HIP 89218 |
7.54 |
| 2026-06-18 00:00 |
18:12:16.60 |
-10:36:27.6 |
HIP 89218 |
7.68 |
| 2026-06-18 12:00 |
18:12:12.13 |
-10:36:31.4 |
HIP 89218 |
7.98 |
| 2026-06-19 00:00 |
18:12:07.65 |
-10:36:35.4 |
HIP 89218 |
8.41 |
| 2026-06-19 12:00 |
18:12:03.16 |
-10:36:39.5 |
HIP 89218 |
8.95 |
| 2026-06-20 00:00 |
18:11:58.68 |
-10:36:43.7 |
HIP 89218 |
9.59 |
| 2026-06-20 12:00 |
18:11:54.19 |
-10:36:48.1 |
HIP 89218 |
10.31 |
| 2026-06-21 00:00 |
18:11:49.70 |
-10:36:52.6 |
HIP 89218 |
11.08 |
| 2026-06-21 12:00 |
18:11:45.21 |
-10:36:57.1 |
HIP 89218 |
11.92 |
| 2026-06-22 00:00 |
18:11:40.71 |
-10:37:01.9 |
HIP 89218 |
12.79 |