메타데이터
| 항목 |
값 |
| Designation |
P/2014 X1 (Elenin) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-01-07T17:47:02.451840Z |
| Orbit solution date (soln_date, UTC) |
2024-10-10T18:10:33Z |
| Obs used |
630 |
| NEO |
- |
| M1 |
15.500 |
| K1 |
6.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-01-31.0000000 |
| e |
0.71002420 |
| q (au) |
1.814883 |
| a (au) |
6.258740 |
| i (deg) |
25.971382 |
| Ω (om, deg) |
61.569156 |
| ω (w, deg) |
34.367877 |
| M (ma, deg) |
1.464080 |
밝기
산란 + 전체 선형
$$
M_a = (14.535 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.535 |
| n |
2.000 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2014-09-04 |
2015-01-06 |
+19.0602 |
-4.445 |
| 2015-01-08 |
2016-03-15 |
+3.0066 |
-1.877 |
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 |
20:41:50.86 |
-42:31:07.1 |
HIP 102057 |
12.54 |
| 2026-06-01 12:00 |
20:41:45.18 |
-42:32:45.2 |
HIP 102057 |
12.79 |
| 2026-06-02 00:00 |
20:41:39.35 |
-42:34:23.5 |
HIP 102057 |
13.31 |
| 2026-06-02 12:00 |
20:41:33.37 |
-42:36:01.8 |
HIP 102057 |
14.07 |
| 2026-06-03 00:00 |
20:41:27.25 |
-42:37:40.3 |
HIP 102057 |
15.04 |
| 2026-06-03 12:00 |
20:41:20.97 |
-42:39:18.9 |
HIP 102057 |
16.20 |
| 2026-06-04 00:00 |
20:41:14.56 |
-42:40:57.5 |
HIP 102057 |
17.51 |
| 2026-06-04 12:00 |
20:41:07.99 |
-42:42:36.2 |
HIP 101961 |
17.42 |
| 2026-06-05 00:00 |
20:41:01.28 |
-42:44:14.9 |
HIP 101961 |
15.61 |
| 2026-06-05 12:00 |
20:40:54.42 |
-42:45:53.7 |
HIP 101961 |
13.83 |
| 2026-06-06 00:00 |
20:40:47.42 |
-42:47:32.5 |
HIP 101961 |
12.13 |
| 2026-06-06 12:00 |
20:40:40.27 |
-42:49:11.4 |
HIP 101961 |
10.55 |
| 2026-06-07 00:00 |
20:40:32.98 |
-42:50:50.3 |
HIP 101961 |
9.15 |
| 2026-06-07 12:00 |
20:40:25.54 |
-42:52:29.2 |
HIP 101961 |
8.04 |
| 2026-06-08 00:00 |
20:40:17.96 |
-42:54:08.1 |
HIP 101961 |
7.38 |
| 2026-06-08 12:00 |
20:40:10.23 |
-42:55:46.9 |
HIP 101961 |
7.31 |
| 2026-06-09 00:00 |
20:40:02.36 |
-42:57:25.8 |
HIP 102015 |
7.23 |
| 2026-06-09 12:00 |
20:39:54.35 |
-42:59:04.6 |
HIP 102015 |
6.76 |
| 2026-06-10 00:00 |
20:39:46.19 |
-43:00:43.3 |
HIP 102015 |
7.02 |
| 2026-06-10 12:00 |
20:39:37.89 |
-43:02:22.0 |
HIP 102015 |
7.94 |
| 2026-06-11 00:00 |
20:39:29.45 |
-43:04:00.7 |
HIP 102015 |
9.34 |
| 2026-06-11 12:00 |
20:39:20.87 |
-43:05:39.2 |
HIP 102015 |
11.05 |
| 2026-06-12 00:00 |
20:39:12.14 |
-43:07:17.7 |
HIP 102015 |
12.96 |
| 2026-06-12 12:00 |
20:39:03.28 |
-43:08:56.0 |
HIP 102015 |
15.00 |
| 2026-06-13 00:00 |
20:38:54.28 |
-43:10:34.3 |
HIP 102015 |
17.13 |
| 2026-06-13 12:00 |
20:38:45.13 |
-43:12:12.4 |
HIP 101758 |
17.44 |
| 2026-06-14 00:00 |
20:38:35.85 |
-43:13:50.4 |
HIP 101758 |
17.08 |
| 2026-06-14 12:00 |
20:38:26.44 |
-43:15:28.2 |
HIP 101758 |
17.02 |
| 2026-06-15 00:00 |
20:38:16.88 |
-43:17:05.9 |
HIP 101758 |
17.28 |
| 2026-06-15 12:00 |
20:38:07.19 |
-43:18:43.4 |
HIP 101758 |
17.84 |
| 2026-06-16 00:00 |
20:37:57.37 |
-43:20:20.7 |
HIP 101758 |
18.69 |
| 2026-06-16 12:00 |
20:37:47.41 |
-43:21:57.9 |
HIP 101758 |
19.78 |
| 2026-06-17 00:00 |
20:37:37.31 |
-43:23:34.8 |
HIP 101758 |
21.10 |
| 2026-06-17 12:00 |
20:37:27.09 |
-43:25:11.4 |
HIP 101758 |
22.60 |
| 2026-06-18 00:00 |
20:37:16.73 |
-43:26:47.9 |
HIP 101880 |
23.06 |
| 2026-06-18 12:00 |
20:37:06.24 |
-43:28:24.1 |
HIP 101880 |
23.28 |
| 2026-06-19 00:00 |
20:36:55.63 |
-43:30:00.1 |
HIP 101880 |
23.79 |
| 2026-06-19 12:00 |
20:36:44.88 |
-43:31:35.7 |
HIP 101535 |
23.14 |
| 2026-06-20 00:00 |
20:36:34.01 |
-43:33:11.1 |
HIP 101535 |
20.88 |
| 2026-06-20 12:00 |
20:36:23.01 |
-43:34:46.2 |
HIP 101535 |
18.66 |
| 2026-06-21 00:00 |
20:36:11.89 |
-43:36:21.0 |
HIP 101535 |
16.51 |
| 2026-06-21 12:00 |
20:36:00.64 |
-43:37:55.5 |
HIP 101535 |
14.49 |
| 2026-06-22 00:00 |
20:35:49.27 |
-43:39:29.7 |
HIP 101535 |
12.63 |