메타데이터
| 항목 |
값 |
| Designation |
C/2013 R1 (Lovejoy) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2013-12-22T17:35:41.714880Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:40Z |
| Obs used |
3894 |
| NEO |
- |
| M1 |
11.500 |
| K1 |
7.250 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2013-12-29.0000000 |
| e |
0.99842519 |
| q (au) |
0.811826 |
| a (au) |
515.505940 |
| i (deg) |
64.040953 |
| Ω (om, deg) |
70.711175 |
| ω (w, deg) |
67.166449 |
| M (ma, deg) |
0.000528 |
밝기
산란 + 전체 선형
$$
M_a = (11.126 + 5.399\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
11.126 |
| n |
5.399 |
| gf |
1.000 |
| gb |
-0.758 |
| k |
0.800 |
| 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 |
| 2013-09-07 |
2013-12-22 |
+3.3697 |
-1.131 |
| 2013-12-22 |
2014-03-14 |
+1.6099 |
-2.730 |
| 2014-03-14 |
2014-09-14 |
+3.9594 |
-2.438 |
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 |
19:04:06.26 |
-65:59:21.7 |
HIP 93373 |
21.99 |
| 2026-05-12 12:00 |
19:04:00.67 |
-66:00:00.6 |
HIP 93373 |
21.16 |
| 2026-05-13 00:00 |
19:03:55.00 |
-66:00:39.2 |
HIP 93373 |
20.33 |
| 2026-05-13 12:00 |
19:03:49.27 |
-66:01:17.7 |
HIP 93373 |
19.49 |
| 2026-05-14 00:00 |
19:03:43.45 |
-66:01:56.0 |
HIP 93373 |
18.65 |
| 2026-05-14 12:00 |
19:03:37.57 |
-66:02:34.1 |
HIP 93373 |
17.82 |
| 2026-05-15 00:00 |
19:03:31.61 |
-66:03:12.0 |
HIP 93373 |
16.98 |
| 2026-05-15 12:00 |
19:03:25.58 |
-66:03:49.6 |
HIP 93373 |
16.14 |
| 2026-05-16 00:00 |
19:03:19.48 |
-66:04:27.1 |
HIP 93373 |
15.30 |
| 2026-05-16 12:00 |
19:03:13.30 |
-66:05:04.4 |
HIP 93373 |
14.46 |
| 2026-05-17 00:00 |
19:03:07.06 |
-66:05:41.4 |
HIP 93373 |
13.62 |
| 2026-05-17 12:00 |
19:03:00.74 |
-66:06:18.2 |
HIP 93373 |
12.78 |
| 2026-05-18 00:00 |
19:02:54.36 |
-66:06:54.9 |
HIP 93373 |
11.94 |
| 2026-05-18 12:00 |
19:02:47.90 |
-66:07:31.2 |
HIP 93373 |
11.11 |
| 2026-05-19 00:00 |
19:02:41.38 |
-66:08:07.4 |
HIP 93373 |
10.28 |
| 2026-05-19 12:00 |
19:02:34.78 |
-66:08:43.3 |
HIP 93373 |
9.46 |
| 2026-05-20 00:00 |
19:02:28.12 |
-66:09:19.0 |
HIP 93373 |
8.65 |
| 2026-05-20 12:00 |
19:02:21.39 |
-66:09:54.5 |
HIP 93373 |
7.85 |
| 2026-05-21 00:00 |
19:02:14.60 |
-66:10:29.7 |
HIP 93373 |
7.07 |
| 2026-05-21 12:00 |
19:02:07.73 |
-66:11:04.6 |
HIP 93373 |
6.32 |
| 2026-05-22 00:00 |
19:02:00.81 |
-66:11:39.4 |
HIP 93373 |
5.60 |
| 2026-05-22 12:00 |
19:01:53.81 |
-66:12:13.8 |
HIP 93373 |
4.95 |
| 2026-05-23 00:00 |
19:01:46.76 |
-66:12:48.1 |
HIP 93373 |
4.38 |
| 2026-05-23 12:00 |
19:01:39.64 |
-66:13:22.0 |
HIP 93373 |
3.93 |
| 2026-05-24 00:00 |
19:01:32.45 |
-66:13:55.7 |
HIP 93373 |
3.66 |
| 2026-05-24 12:00 |
19:01:25.20 |
-66:14:29.2 |
HIP 93373 |
3.59 |
| 2026-05-25 00:00 |
19:01:17.90 |
-66:15:02.4 |
HIP 93373 |
3.76 |
| 2026-05-25 12:00 |
19:01:10.52 |
-66:15:35.3 |
HIP 93373 |
4.12 |
| 2026-05-26 00:00 |
19:01:03.09 |
-66:16:07.9 |
HIP 93373 |
4.63 |
| 2026-05-26 12:00 |
19:00:55.60 |
-66:16:40.3 |
HIP 93373 |
5.26 |
| 2026-05-27 00:00 |
19:00:48.05 |
-66:17:12.4 |
HIP 93373 |
5.96 |
| 2026-05-27 12:00 |
19:00:40.44 |
-66:17:44.2 |
HIP 93358 |
6.66 |
| 2026-05-28 00:00 |
19:00:32.77 |
-66:18:15.8 |
HIP 93358 |
6.41 |
| 2026-05-28 12:00 |
19:00:25.04 |
-66:18:47.0 |
HIP 93358 |
6.29 |
| 2026-05-29 00:00 |
19:00:17.26 |
-66:19:18.0 |
HIP 93358 |
6.32 |
| 2026-05-29 12:00 |
19:00:09.41 |
-66:19:48.7 |
HIP 93358 |
6.49 |
| 2026-05-30 00:00 |
19:00:01.52 |
-66:20:19.1 |
HIP 93358 |
6.80 |
| 2026-05-30 12:00 |
18:59:53.56 |
-66:20:49.2 |
HIP 93358 |
7.22 |
| 2026-05-31 00:00 |
18:59:45.56 |
-66:21:19.0 |
HIP 93358 |
7.74 |
| 2026-05-31 12:00 |
18:59:37.49 |
-66:21:48.6 |
HIP 93358 |
8.34 |
| 2026-06-01 00:00 |
18:59:29.38 |
-66:22:17.8 |
HIP 93358 |
9.01 |
| 2026-06-01 12:00 |
18:59:21.21 |
-66:22:46.7 |
HIP 93358 |
9.73 |
| 2026-06-02 00:00 |
18:59:12.99 |
-66:23:15.3 |
HIP 93358 |
10.49 |